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<TITLE>LAMMPS Users Manual</TITLE>
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<li class="toctree-l1"><a class="reference internal" href="Section_intro.html">1. Introduction</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_start.html">2. Getting Started</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_commands.html">3. Commands</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_packages.html">4. Packages</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_accelerate.html">5. Accelerating LAMMPS performance</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_howto.html">6. How-to discussions</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_example.html">7. Example problems</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_perf.html">8. Performance &amp; scalability</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_tools.html">9. Additional tools</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_modify.html">10. Modifying &amp; extending LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_python.html">11. Python interface to LAMMPS</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_errors.html">12. Errors</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_history.html">13. Future and history</a></li>
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<H1></H1>
<CENTER><H3>LAMMPS Documentation
</H3></CENTER>
<CENTER><H4>22 Oct 2015 version
</H4></CENTER>
<H4>Version info:
</H4>
<P>The LAMMPS "version" is the date when it was released, such as 1 May
<div class="wy-nav-content">
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<a href="Section_intro.html" class="btn btn-neutral float-right" title="1. Introduction" accesskey="n">Next <span class="fa fa-arrow-circle-right"></span></a>
</div>
</div>
<div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
<div itemprop="articleBody">
<H1></H1><div class="section" id="lammps-documentation">
<h1>LAMMPS Documentation<a class="headerlink" href="#lammps-documentation" title="Permalink to this headline"></a></h1>
<div class="section" id="aug-2015-version">
<h2>10 Aug 2015 version<a class="headerlink" href="#aug-2015-version" title="Permalink to this headline"></a></h2>
</div>
<div class="section" id="version-info">
<h2>Version info:<a class="headerlink" href="#version-info" title="Permalink to this headline"></a></h2>
<p>The LAMMPS &#8220;version&#8221; is the date when it was released, such as 1 May
2010. LAMMPS is updated continuously. Whenever we fix a bug or add a
feature, we release it immediately, and post a notice on <A HREF = "http://lammps.sandia.gov/bug.html">this page of
the WWW site</A>. Each dated copy of LAMMPS contains all the
feature, we release it immediately, and post a notice on <a class="reference external" href="http://lammps.sandia.gov/bug.html">this page of the WWW site</a>. Each dated copy of LAMMPS contains all the
features and bug-fixes up to and including that version date. The
version date is printed to the screen and logfile every time you run
LAMMPS. It is also in the file src/version.h and in the LAMMPS
directory name created when you unpack a tarball, and at the top of
the first page of the manual (this page).
</P>
<UL><LI>If you browse the HTML doc pages on the LAMMPS WWW site, they always
describe the most current version of LAMMPS.
<LI>If you browse the HTML doc pages included in your tarball, they
describe the version you have.
<LI>The <A HREF = "Manual.pdf">PDF file</A> on the WWW site or in the tarball is updated
about once per month. This is because it is large, and we don't want
it to be part of every patch.
<LI>There is also a <A HREF = "Developer.pdf">Developer.pdf</A> file in the doc
the first page of the manual (this page).</p>
<ul class="simple">
<li>If you browse the HTML doc pages on the LAMMPS WWW site, they always
describe the most current version of LAMMPS.</li>
<li>If you browse the HTML doc pages included in your tarball, they
describe the version you have.</li>
<li>The <a class="reference external" href="Manual.pdf">PDF file</a> on the WWW site or in the tarball is updated
about once per month. This is because it is large, and we don&#8217;t want
it to be part of every patch.</li>
<li>There is also a <a class="reference external" href="Developer.pdf">Developer.pdf</a> file in the doc
directory, which describes the internal structure and algorithms of
LAMMPS.
</UL>
<P>LAMMPS stands for Large-scale Atomic/Molecular Massively Parallel
Simulator.
</P>
<P>LAMMPS is a classical molecular dynamics simulation code designed to
LAMMPS.</li>
</ul>
<p>LAMMPS stands for Large-scale Atomic/Molecular Massively Parallel
Simulator.</p>
<p>LAMMPS is a classical molecular dynamics simulation code designed to
run efficiently on parallel computers. It was developed at Sandia
National Laboratories, a US Department of Energy facility, with
funding from the DOE. It is an open-source code, distributed freely
under the terms of the GNU Public License (GPL).
</P>
<P>The primary developers of LAMMPS are <A HREF = "http://www.sandia.gov/~sjplimp">Steve Plimpton</A>, Aidan
under the terms of the GNU Public License (GPL).</p>
<p>The primary developers of LAMMPS are <a class="reference external" href="http://www.sandia.gov/~sjplimp">Steve Plimpton</a>, Aidan
Thompson, and Paul Crozier who can be contacted at
sjplimp,athomps,pscrozi at sandia.gov. The <A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> at
http://lammps.sandia.gov has more information about the code and its
uses.
</P>
<HR>
<P>The LAMMPS documentation is organized into the following sections. If
sjplimp,athomps,pscrozi at sandia.gov. The <a class="reference external" href="http://lammps.sandia.gov">LAMMPS WWW Site</a> at
<a class="reference external" href="http://lammps.sandia.gov">http://lammps.sandia.gov</a> has more information about the code and its
uses.</p>
<hr class="docutils" />
<p>The LAMMPS documentation is organized into the following sections. If
you find errors or omissions in this manual or have suggestions for
useful information to add, please send an email to the developers so
we can improve the LAMMPS documentation.
</P>
<P>Once you are familiar with LAMMPS, you may want to bookmark <A HREF = "Section_commands.html#comm">this
page</A> at Section_commands.html#comm since
it gives quick access to documentation for all LAMMPS commands.
</P>
<P><A HREF = "Manual.pdf">PDF file</A> of the entire manual, generated by
<A HREF = "http://freecode.com/projects/htmldoc">htmldoc</A>
</P>
<P><!-- RST
</P>
<P>.. toctree::
:maxdepth: 2
:numbered: // comment
</P>
<P> Section_intro
Section_start
Section_commands
Section_packages
Section_accelerate
Section_howto
Section_example
Section_perf
Section_tools
Section_modify
Section_python
Section_errors
Section_history
</P>
<P>Indices and tables
==================
</P>
<P>* :ref:`genindex` // comment
* :ref:`search` // comment
</P>
<P>END_RST -->
</P>
<OL><LI><!-- HTML_ONLY -->
<A HREF = "Section_intro.html">Introduction</A>
<UL> 1.1 <A HREF = "Section_intro.html#intro_1">What is LAMMPS</A>
<BR>
1.2 <A HREF = "Section_intro.html#intro_2">LAMMPS features</A>
<BR>
1.3 <A HREF = "Section_intro.html#intro_3">LAMMPS non-features</A>
<BR>
1.4 <A HREF = "Section_intro.html#intro_4">Open source distribution</A>
<BR>
1.5 <A HREF = "Section_intro.html#intro_5">Acknowledgments and citations</A>
<BR></UL>
<LI><A HREF = "Section_start.html">Getting started</A>
<UL> 2.1 <A HREF = "Section_start.html#start_1">What's in the LAMMPS distribution</A>
<BR>
2.2 <A HREF = "Section_start.html#start_2">Making LAMMPS</A>
<BR>
2.3 <A HREF = "Section_start.html#start_3">Making LAMMPS with optional packages</A>
<BR>
2.4 <A HREF = "Section_start.html#start_4">Building LAMMPS via the Make.py script</A>
<BR>
2.5 <A HREF = "Section_start.html#start_5">Building LAMMPS as a library</A>
<BR>
2.6 <A HREF = "Section_start.html#start_6">Running LAMMPS</A>
<BR>
2.7 <A HREF = "Section_start.html#start_7">Command-line options</A>
<BR>
2.8 <A HREF = "Section_start.html#start_8">Screen output</A>
<BR>
2.9 <A HREF = "Section_start.html#start_9">Tips for users of previous versions</A>
<BR></UL>
<LI><A HREF = "Section_commands.html">Commands</A>
<UL> 3.1 <A HREF = "Section_commands.html#cmd_1">LAMMPS input script</A>
<BR>
3.2 <A HREF = "Section_commands.html#cmd_2">Parsing rules</A>
<BR>
3.3 <A HREF = "Section_commands.html#cmd_3">Input script structure</A>
<BR>
3.4 <A HREF = "Section_commands.html#cmd_4">Commands listed by category</A>
<BR>
3.5 <A HREF = "Section_commands.html#cmd_5">Commands listed alphabetically</A>
<BR></UL>
<LI><A HREF = "Section_packages.html">Packages</A>
<UL> 4.1 <A HREF = "Section_packages.html#pkg_1">Standard packages</A>
<BR>
4.2 <A HREF = "Section_packages.html#pkg_2">User packages</A>
<BR></UL>
<LI><A HREF = "Section_accelerate.html">Accelerating LAMMPS performance</A>
<UL> 5.1 <A HREF = "Section_accelerate.html#acc_1">Measuring performance</A>
<BR>
5.2 <A HREF = "Section_accelerate.html#acc_2">Algorithms and code options to boost performace</A>
<BR>
5.3 <A HREF = "Section_accelerate.html#acc_3">Accelerator packages with optimized styles</A>
<BR>
<UL> 5.3.1 <A HREF = "accelerate_cuda.html">USER-CUDA package</A>
<BR>
5.3.2 <A HREF = "accelerate_gpu.html">GPU package</A>
<BR>
5.3.3 <A HREF = "accelerate_intel.html">USER-INTEL package</A>
<BR>
5.3.4 <A HREF = "accelerate_kokkos.html">KOKKOS package</A>
<BR>
5.3.5 <A HREF = "accelerate_omp.html">USER-OMP package</A>
<BR>
5.3.6 <A HREF = "accelerate_opt.html">OPT package</A>
<BR></UL>
5.4 <A HREF = "Section_accelerate.html#acc_4">Comparison of various accelerator packages</A>
<BR></UL>
<LI><A HREF = "Section_howto.html">How-to discussions</A>
<UL> 6.1 <A HREF = "Section_howto.html#howto_1">Restarting a simulation</A>
<BR>
6.2 <A HREF = "Section_howto.html#howto_2">2d simulations</A>
<BR>
6.3 <A HREF = "Section_howto.html#howto_3">CHARMM and AMBER force fields</A>
<BR>
6.4 <A HREF = "Section_howto.html#howto_4">Running multiple simulations from one input script</A>
<BR>
6.5 <A HREF = "Section_howto.html#howto_5">Multi-replica simulations</A>
<BR>
6.6 <A HREF = "Section_howto.html#howto_6">Granular models</A>
<BR>
6.7 <A HREF = "Section_howto.html#howto_7">TIP3P water model</A>
<BR>
6.8 <A HREF = "Section_howto.html#howto_8">TIP4P water model</A>
<BR>
6.9 <A HREF = "Section_howto.html#howto_9">SPC water model</A>
<BR>
6.10 <A HREF = "Section_howto.html#howto_10">Coupling LAMMPS to other codes</A>
<BR>
6.11 <A HREF = "Section_howto.html#howto_11">Visualizing LAMMPS snapshots</A>
<BR>
6.12 <A HREF = "Section_howto.html#howto_12">Triclinic (non-orthogonal) simulation boxes</A>
<BR>
6.13 <A HREF = "Section_howto.html#howto_13">NEMD simulations</A>
<BR>
6.14 <A HREF = "Section_howto.html#howto_14">Finite-size spherical and aspherical particles</A>
<BR>
6.15 <A HREF = "Section_howto.html#howto_15">Output from LAMMPS (thermo, dumps, computes, fixes, variables)</A>
<BR>
6.16 <A HREF = "Section_howto.html#howto_16">Thermostatting, barostatting, and compute temperature</A>
<BR>
6.17 <A HREF = "Section_howto.html#howto_17">Walls</A>
<BR>
6.18 <A HREF = "Section_howto.html#howto_18">Elastic constants</A>
<BR>
6.19 <A HREF = "Section_howto.html#howto_19">Library interface to LAMMPS</A>
<BR>
6.20 <A HREF = "Section_howto.html#howto_20">Calculating thermal conductivity</A>
<BR>
6.21 <A HREF = "Section_howto.html#howto_21">Calculating viscosity</A>
<BR>
6.22 <A HREF = "Section_howto.html#howto_22">Calculating a diffusion coefficient</A>
<BR>
6.23 <A HREF = "Section_howto.html#howto_23">Using chunks to calculate system properties</A>
<BR>
6.24 <A HREF = "Section_howto.html#howto_24">Setting parameters for pppm/disp</A>
<BR>
6.25 <A HREF = "Section_howto.html#howto_25">Polarizable models</A>
<BR>
6.26 <A HREF = "Section_howto.html#howto_26">Adiabatic core/shell model</A>
<BR>
6.27 <A HREF = "Section_howto.html#howto_27">Drude induced dipoles</A>
<BR></UL>
<LI><A HREF = "Section_example.html">Example problems</A>
<LI><A HREF = "Section_perf.html">Performance & scalability</A>
<LI><A HREF = "Section_tools.html">Additional tools</A>
<LI><A HREF = "Section_modify.html">Modifying & extending LAMMPS</A>
<UL> 10.1 <A HREF = "Section_modify.html#mod_1">Atom styles</A>
<BR>
10.2 <A HREF = "Section_modify.html#mod_2">Bond, angle, dihedral, improper potentials</A>
<BR>
10.3 <A HREF = "Section_modify.html#mod_3">Compute styles</A>
<BR>
10.4 <A HREF = "Section_modify.html#mod_4">Dump styles</A>
<BR>
10.5 <A HREF = "Section_modify.html#mod_5">Dump custom output options</A>
<BR>
10.6 <A HREF = "Section_modify.html#mod_6">Fix styles</A>
<BR>
10.7 <A HREF = "Section_modify.html#mod_7">Input script commands</A>
<BR>
10.8 <A HREF = "Section_modify.html#mod_8">Kspace computations</A>
<BR>
10.9 <A HREF = "Section_modify.html#mod_9">Minimization styles</A>
<BR>
10.10 <A HREF = "Section_modify.html#mod_10">Pairwise potentials</A>
<BR>
10.11 <A HREF = "Section_modify.html#mod_11">Region styles</A>
<BR>
10.12 <A HREF = "Section_modify.html#mod_12">Body styles</A>
<BR>
10.13 <A HREF = "Section_modify.html#mod_13">Thermodynamic output options</A>
<BR>
10.14 <A HREF = "Section_modify.html#mod_14">Variable options</A>
<BR>
10.15 <A HREF = "Section_modify.html#mod_15">Submitting new features for inclusion in LAMMPS</A>
<BR></UL>
<LI><A HREF = "Section_python.html">Python interface</A>
<UL> 11.1 <A HREF = "Section_python.html#py_1">Overview of running LAMMPS from Python</A>
<BR>
11.2 <A HREF = "Section_python.html#py_2">Overview of using Python from a LAMMPS script</A>
<BR>
11.3 <A HREF = "Section_python.html#py_3">Building LAMMPS as a shared library</A>
<BR>
11.4 <A HREF = "Section_python.html#py_4">Installing the Python wrapper into Python</A>
<BR>
11.5 <A HREF = "Section_python.html#py_5">Extending Python with MPI to run in parallel</A>
<BR>
11.6 <A HREF = "Section_python.html#py_6">Testing the Python-LAMMPS interface</A>
<BR>
11.7 <A HREF = "py_7">Using LAMMPS from Python</A>
<BR>
11.8 <A HREF = "py_8">Example Python scripts that use LAMMPS</A>
<BR></UL>
<LI><A HREF = "Section_errors.html">Errors</A>
<UL> 12.1 <A HREF = "Section_errors.html#err_1">Common problems</A>
<BR>
12.2 <A HREF = "Section_errors.html#err_2">Reporting bugs</A>
<BR>
12.3 <A HREF = "Section_errors.html#err_3">Error & warning messages</A>
<BR></UL>
<LI><A HREF = "Section_history.html">Future and history</A>
<UL> 13.1 <A HREF = "Section_history.html#hist_1">Coming attractions</A>
<BR>
13.2 <A HREF = "Section_history.html#hist_2">Past versions</A>
<BR></UL>
</OL>
<!-- END_HTML_ONLY -->
</BODY>
</HTML>
we can improve the LAMMPS documentation.</p>
<p>Once you are familiar with LAMMPS, you may want to bookmark <a class="reference internal" href="Section_commands.html#comm"><span>this page</span></a> at Section_commands.html#comm since
it gives quick access to documentation for all LAMMPS commands.</p>
<p><a class="reference external" href="Manual.pdf">PDF file</a> of the entire manual, generated by
<a class="reference external" href="http://freecode.com/projects/htmldoc">htmldoc</a></p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="Section_intro.html">1. Introduction</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_intro.html#what-is-lammps">1.1. What is LAMMPS</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_intro.html#lammps-features">1.2. LAMMPS features</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_intro.html#lammps-non-features">1.3. LAMMPS non-features</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_intro.html#open-source-distribution">1.4. Open source distribution</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_intro.html#acknowledgments-and-citations">1.5. Acknowledgments and citations</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_start.html">2. Getting Started</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#what-s-in-the-lammps-distribution">2.1. What&#8217;s in the LAMMPS distribution</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#making-lammps">2.2. Making LAMMPS</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#making-lammps-with-optional-packages">2.3. Making LAMMPS with optional packages</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#building-lammps-via-the-make-py-tool">2.4. Building LAMMPS via the Make.py tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#building-lammps-as-a-library">2.5. Building LAMMPS as a library</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#running-lammps">2.6. Running LAMMPS</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#command-line-options">2.7. Command-line options</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#lammps-screen-output">2.8. LAMMPS screen output</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_start.html#tips-for-users-of-previous-lammps-versions">2.9. Tips for users of previous LAMMPS versions</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_commands.html">3. Commands</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#lammps-input-script">3.1. LAMMPS input script</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#parsing-rules">3.2. Parsing rules</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#input-script-structure">3.3. Input script structure</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#commands-listed-by-category">3.4. Commands listed by category</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#individual-commands">3.5. Individual commands</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#fix-styles">3.6. Fix styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#compute-styles">3.7. Compute styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#pair-style-potentials">3.8. Pair_style potentials</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#bond-style-potentials">3.9. Bond_style potentials</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#angle-style-potentials">3.10. Angle_style potentials</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#dihedral-style-potentials">3.11. Dihedral_style potentials</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#improper-style-potentials">3.12. Improper_style potentials</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_commands.html#kspace-solvers">3.13. Kspace solvers</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_packages.html">4. Packages</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#standard-packages">4.1. Standard packages</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-compress-package">4.2. Build instructions for COMPRESS package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-gpu-package">4.3. Build instructions for GPU package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-kim-package">4.4. Build instructions for KIM package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-kokkos-package">4.5. Build instructions for KOKKOS package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-kspace-package">4.6. Build instructions for KSPACE package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-meam-package">4.7. Build instructions for MEAM package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-poems-package">4.8. Build instructions for POEMS package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-python-package">4.9. Build instructions for PYTHON package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-reax-package">4.10. Build instructions for REAX package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-voronoi-package">4.11. Build instructions for VORONOI package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#build-instructions-for-xtc-package">4.12. Build instructions for XTC package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-packages">4.13. User packages</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-atc-package">4.14. USER-ATC package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-awpmd-package">4.15. USER-AWPMD package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-cg-cmm-package">4.16. USER-CG-CMM package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-colvars-package">4.17. USER-COLVARS package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-cuda-package">4.18. USER-CUDA package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-diffraction-package">4.19. USER-DIFFRACTION package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-drude-package">4.20. USER-DRUDE package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-eff-package">4.21. USER-EFF package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-fep-package">4.22. USER-FEP package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-h5md-package">4.23. USER-H5MD package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-intel-package">4.24. USER-INTEL package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-lb-package">4.25. USER-LB package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-misc-package">4.26. USER-MISC package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-molfile-package">4.27. USER-MOLFILE package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-omp-package">4.28. USER-OMP package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-phonon-package">4.29. USER-PHONON package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-qmmm-package">4.30. USER-QMMM package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-qtb-package">4.31. USER-QTB package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-reaxc-package">4.32. USER-REAXC package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-smd-package">4.33. USER-SMD package</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_packages.html#user-sph-package">4.34. USER-SPH package</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_accelerate.html">5. Accelerating LAMMPS performance</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_accelerate.html#measuring-performance">5.1. Measuring performance</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_accelerate.html#general-strategies">5.2. General strategies</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_accelerate.html#packages-with-optimized-styles">5.3. Packages with optimized styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_accelerate.html#comparison-of-various-accelerator-packages">5.4. Comparison of various accelerator packages</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_howto.html">6. How-to discussions</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#restarting-a-simulation">6.1. Restarting a simulation</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#d-simulations">6.2. 2d simulations</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#charmm-amber-and-dreiding-force-fields">6.3. CHARMM, AMBER, and DREIDING force fields</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#running-multiple-simulations-from-one-input-script">6.4. Running multiple simulations from one input script</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#multi-replica-simulations">6.5. Multi-replica simulations</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#granular-models">6.6. Granular models</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#tip3p-water-model">6.7. TIP3P water model</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#tip4p-water-model">6.8. TIP4P water model</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#spc-water-model">6.9. SPC water model</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#coupling-lammps-to-other-codes">6.10. Coupling LAMMPS to other codes</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#visualizing-lammps-snapshots">6.11. Visualizing LAMMPS snapshots</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#triclinic-non-orthogonal-simulation-boxes">6.12. Triclinic (non-orthogonal) simulation boxes</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#nemd-simulations">6.13. NEMD simulations</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#finite-size-spherical-and-aspherical-particles">6.14. Finite-size spherical and aspherical particles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#output-from-lammps-thermo-dumps-computes-fixes-variables">6.15. Output from LAMMPS (thermo, dumps, computes, fixes, variables)</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#thermostatting-barostatting-and-computing-temperature">6.16. Thermostatting, barostatting, and computing temperature</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#walls">6.17. Walls</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#elastic-constants">6.18. Elastic constants</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#library-interface-to-lammps">6.19. Library interface to LAMMPS</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#calculating-thermal-conductivity">6.20. Calculating thermal conductivity</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#calculating-viscosity">6.21. Calculating viscosity</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#calculating-a-diffusion-coefficient">6.22. Calculating a diffusion coefficient</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#using-chunks-to-calculate-system-properties">6.23. Using chunks to calculate system properties</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#setting-parameters-for-the-kspace-style-pppm-disp-command">6.24. Setting parameters for the <code class="docutils literal"><span class="pre">kspace_style</span> <span class="pre">pppm/disp</span></code> command</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#polarizable-models">6.25. Polarizable models</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#adiabatic-core-shell-model">6.26. Adiabatic core/shell model</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_howto.html#drude-induced-dipoles">6.27. Drude induced dipoles</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_example.html">7. Example problems</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_perf.html">8. Performance &amp; scalability</a></li>
<li class="toctree-l1"><a class="reference internal" href="Section_tools.html">9. Additional tools</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#amber2lmp-tool">9.1. amber2lmp tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#binary2txt-tool">9.2. binary2txt tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#ch2lmp-tool">9.3. ch2lmp tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#chain-tool">9.4. chain tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#colvars-tools">9.5. colvars tools</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#createatoms-tool">9.6. createatoms tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#data2xmovie-tool">9.7. data2xmovie tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#eam-database-tool">9.8. eam database tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#eam-generate-tool">9.9. eam generate tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#eff-tool">9.10. eff tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#emacs-tool">9.11. emacs tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#fep-tool">9.12. fep tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#i-pi-tool">9.13. i-pi tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#ipp-tool">9.14. ipp tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#kate-tool">9.15. kate tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#lmp2arc-tool">9.16. lmp2arc tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#lmp2cfg-tool">9.17. lmp2cfg tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#lmp2vmd-tool">9.18. lmp2vmd tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#matlab-tool">9.19. matlab tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#micelle2d-tool">9.20. micelle2d tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#moltemplate-tool">9.21. moltemplate tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#msi2lmp-tool">9.22. msi2lmp tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#phonon-tool">9.23. phonon tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#polymer-bonding-tool">9.24. polymer bonding tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#pymol-asphere-tool">9.25. pymol_asphere tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#python-tool">9.26. python tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#reax-tool">9.27. reax tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#restart2data-tool">9.28. restart2data tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#vim-tool">9.29. vim tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#xmgrace-tool">9.30. xmgrace tool</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_tools.html#xmovie-tool">9.31. xmovie tool</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_modify.html">10. Modifying &amp; extending LAMMPS</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#atom-styles">10.1. Atom styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#bond-angle-dihedral-improper-potentials">10.2. Bond, angle, dihedral, improper potentials</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#compute-styles">10.3. Compute styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#dump-styles">10.4. Dump styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#dump-custom-output-options">10.5. Dump custom output options</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#fix-styles">10.6. Fix styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#input-script-commands">10.7. Input script commands</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#kspace-computations">10.8. Kspace computations</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#minimization-styles">10.9. Minimization styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#pairwise-potentials">10.10. Pairwise potentials</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#region-styles">10.11. Region styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#body-styles">10.12. Body styles</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#thermodynamic-output-options">10.13. Thermodynamic output options</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#variable-options">10.14. Variable options</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_modify.html#submitting-new-features-for-inclusion-in-lammps">10.15. Submitting new features for inclusion in LAMMPS</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_python.html">11. Python interface to LAMMPS</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_python.html#overview-of-running-lammps-from-python">11.1. Overview of running LAMMPS from Python</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_python.html#overview-of-using-python-from-a-lammps-script">11.2. Overview of using Python from a LAMMPS script</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_python.html#building-lammps-as-a-shared-library">11.3. Building LAMMPS as a shared library</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_python.html#installing-the-python-wrapper-into-python">11.4. Installing the Python wrapper into Python</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_python.html#extending-python-with-mpi-to-run-in-parallel">11.5. Extending Python with MPI to run in parallel</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_python.html#testing-the-python-lammps-interface">11.6. Testing the Python-LAMMPS interface</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_python.html#using-lammps-from-python">11.7. Using LAMMPS from Python</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_python.html#example-python-scripts-that-use-lammps">11.8. Example Python scripts that use LAMMPS</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_errors.html">12. Errors</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_errors.html#common-problems">12.1. Common problems</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_errors.html#reporting-bugs">12.2. Reporting bugs</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_errors.html#error-warning-messages">12.3. Error &amp; warning messages</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_errors.html#error">12.4. Errors:</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_errors.html#warnings">12.5. Warnings:</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="Section_history.html">13. Future and history</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Section_history.html#coming-attractions">13.1. Coming attractions</a></li>
<li class="toctree-l2"><a class="reference internal" href="Section_history.html#past-versions">13.2. Past versions</a></li>
</ul>
</li>
</ul>
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<P><CENTER><H3>LAMMPS Documentation
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<CENTER><H4>21 Oct 2015 version
<CENTER><H4>22 Oct 2015 version
</H4></CENTER>
<H4>Version info:
</H4>

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@ -1,7 +1,7 @@
<!-- HTML_ONLY -->
<HEAD>
<TITLE>LAMMPS Users Manual</TITLE>
<META NAME="docnumber" CONTENT="22 Oct 2015 version">
<META NAME="docnumber" CONTENT="10 Aug 2015 version">
<META NAME="author" CONTENT="http://lammps.sandia.gov - Sandia National Laboratories">
<META NAME="copyright" CONTENT="Copyright (2003) Sandia Corporation. This software and manual is distributed under the GNU General Public License.">
</HEAD>
@ -21,7 +21,7 @@
<H1></H1>
LAMMPS Documentation :c,h3
22 Oct 2015 version :c,h4
10 Aug 2015 version :c,h4
Version info: :h4
@ -85,7 +85,7 @@ it gives quick access to documentation for all LAMMPS commands.
.. toctree::
:maxdepth: 2
:numbered: // comment
:numbered:
Section_intro
Section_start
@ -105,8 +105,8 @@ it gives quick access to documentation for all LAMMPS commands.
Indices and tables
==================
* :ref:`genindex` // comment
* :ref:`search` // comment
* :ref:`genindex`
* :ref:`search`
END_RST -->

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@ -213,11 +213,15 @@ style supports it. Note that the <a class="reference internal" href="pair_style
to specify these parameters initially; the fix adapt command simply
overrides the parameters.</p>
<p>The <em>pstyle</em> argument is the name of the pair style. If <a class="reference internal" href="pair_hybrid.html"><em>pair_style hybrid or hybrid/overlay</em></a> is used, <em>pstyle</em> should be
a sub-style name. For example, <em>pstyle</em> could be specified as &#8220;soft&#8221;
or &#8220;lubricate&#8221;. The <em>pparam</em> argument is the name of the parameter to
change. This is the current list of pair styles and parameters that
can be varied by this fix. See the doc pages for individual pair
styles and their energy formulas for the meaning of these parameters:</p>
a sub-style name. If there are multiple sub-styles using the same
pair style, then <em>pstyle</em> should be specified as &#8220;style:N&#8221; where N is
which instance of the pair style you wish to adapt, e.g. the first,
second, etc. For example, <em>pstyle</em> could be specified as &#8220;soft&#8221; or
&#8220;lubricate&#8221; or &#8220;lj/cut:1&#8221; or &#8220;lj/cut:2&#8221;. The <em>pparam</em> argument is the
name of the parameter to change. This is the current list of pair
styles and parameters that can be varied by this fix. See the doc
pages for individual pair styles and their energy formulas for the
meaning of these parameters:</p>
<table border="1" class="docutils">
<colgroup>
<col width="51%" />

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@ -93,11 +93,15 @@ overrides the parameters.
The {pstyle} argument is the name of the pair style. If "pair_style
hybrid or hybrid/overlay"_pair_hybrid.html is used, {pstyle} should be
a sub-style name. For example, {pstyle} could be specified as "soft"
or "lubricate". The {pparam} argument is the name of the parameter to
change. This is the current list of pair styles and parameters that
can be varied by this fix. See the doc pages for individual pair
styles and their energy formulas for the meaning of these parameters:
a sub-style name. If there are multiple sub-styles using the same
pair style, then {pstyle} should be specified as "style:N" where N is
which instance of the pair style you wish to adapt, e.g. the first,
second, etc. For example, {pstyle} could be specified as "soft" or
"lubricate" or "lj/cut:1" or "lj/cut:2". The {pparam} argument is the
name of the parameter to change. This is the current list of pair
styles and parameters that can be varied by this fix. See the doc
pages for individual pair styles and their energy formulas for the
meaning of these parameters:
"born"_pair_born.html: a,b,c: type pairs:
"buck"_pair_buck.html: a,c: type pairs:

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@ -128,30 +128,43 @@
<span id="index-0"></span><h1>molecule command<a class="headerlink" href="#molecule-command" title="Permalink to this headline"></a></h1>
<div class="section" id="syntax">
<h2>Syntax<a class="headerlink" href="#syntax" title="Permalink to this headline"></a></h2>
<div class="highlight-python"><div class="highlight"><pre>molecule ID file1 file2 ... keyword values ...
<div class="highlight-python"><div class="highlight"><pre>molecule ID file1 keyword values ... file2 keyword values ... fileN ...
</pre></div>
</div>
<ul class="simple">
<li>ID = user-assigned name for the molecule template</li>
<li>file1,file2,... = names of files containing molecule descriptions</li>
<li>zero or more keyword/value pairs may be appended</li>
<li>keyword = <em>offset</em></li>
<li>zero or more keyword/value pairs may be appended after each file</li>
<li>keyword = <em>offset</em> or <em>toff</em> or <em>boff</em> or <em>aoff</em> or <em>doff</em> or <em>ioff</em> or <em>scale</em></li>
</ul>
<pre class="literal-block">
<em>offset</em> values = toff boff aoff doff ioff
toff = offset to add to atom types
boff = offset to add to bond types
aoff = offset to add to angle types
doff = offset to add to dihedral types
ioff = offset to add to improper types
<em>offset</em> values = Toff Boff Aoff Doff Ioff
Toff = offset to add to atom types
Boff = offset to add to bond types
Aoff = offset to add to angle types
Doff = offset to add to dihedral types
Ioff = offset to add to improper types
<em>toff</em> value = Toff
Toff = offset to add to atom types
<em>boff</em> value = Boff
Boff = offset to add to bond types
<em>aoff</em> value = Aoff
Aoff = offset to add to angle types
<em>doff</em> value = Doff
Doff = offset to add to dihedral types
<em>ioff</em> value = Ioff
Ioff = offset to add to improper types
<em>scale</em> value = sfactor
sfactor = scale factor to apply to the size and mass of the molecule
</pre>
</div>
<div class="section" id="examples">
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline"></a></h2>
<div class="highlight-python"><div class="highlight"><pre>molecule 1 mymol
<div class="highlight-python"><div class="highlight"><pre>molecule 1 mymol.txt
molecule 1 co2.txt h2o.txt
molecule CO2 co2.txt
molecule 1 mymol offset 6 9 18 23 14
molecule CO2 co2.txt boff 3 aoff 2
molecule 1 mymol.txt offset 6 9 18 23 14
molecule objects file.1 scale 1.5 file.1 scale 2.0 file.2 scale 1.3
</pre></div>
</div>
</div>
@ -173,24 +186,36 @@ templates include:</p>
<p>The ID of a molecule template can only contain alphanumeric characters
and underscores.</p>
<p>A single template can contain multiple molecules, listed one per file.
Many of the commands listed above currently use only the first
Some of the commands listed above currently use only the first
molecule in the template, and will issue a warning if the template
contains multiple molecules. The <a class="reference internal" href="atom_style.html"><em>atom_style template</em></a> command allows multiple-molecule templates
to define a system with more than one templated molecule.</p>
<p>The optional <em>offset</em> keyword adds the specified offset values to the
atom types, bond types, angle types, dihedral types, and improper
types as they are read from the molecule file. E.g. if <em>toff</em> = 2,
and the file uses atom types 1,2,3, then each created molecule will
have atom types 3,4,5. This is to make it easy to use the same
molecule template file in different simulations. Note that the same
offsets are applied to the molecules in all specified files. All five
offset values must be speicified, but individual values will be
ignored if the molecule template does not use that attribute (e.g. no
bonds).</p>
<p>Each filename can be followed by optional keywords which are applied
only to the molecule in the file as used in this template. This is to
make it easy to use the same molecule file in different molecule
templates or in different simulations. You can specify the same file
multiple times with different optional keywords.</p>
<p>The <em>offset</em>, <em>toff</em>, <em>aoff</em>, <em>doff</em>, <em>ioff</em> keywords add the
specified offset values to the atom types, bond types, angle types,
dihedral types, and/or improper types as they are read from the
molecule file. E.g. if <em>toff</em> = 2, and the file uses atom types
1,2,3, then each created molecule will have atom types 3,4,5. For the
<em>offset</em> keyword, all five offset values must be specified, but
individual values will be ignored if the molecule template does not
use that attribute (e.g. no bonds).</p>
<p>The <em>scale</em> keyword scales the size of the molecule. This can be
useful for modeling polydisperse granular rigid bodies. The scale
factor is applied to each of these properties in the molecule file, if
they are defined: the individual particle coordinates (Coords
section), the individual mass of each particle (Masses section), the
individual diameters of each particle (Diameters section), the total
mass of the molecule (header keyword = mass), the center-of-mass of
the molecule (header keyword = com), and the moments of inertia of the
molecule (header keyword = inertia).</p>
<div class="admonition warning">
<p class="first admonition-title">Warning</p>
<p class="last">This command can be used to define molecules with
bonds, angles, dihedrals, imporopers, or special bond lists of
<p class="last">The molecule command can be used to define molecules
with bonds, angles, dihedrals, imporopers, or special bond lists of
neighbors within a molecular topology, so that you can later add the
molecules to your simulation, via one or more of the commands listed
above. If such molecules do not already exist when LAMMPS creates the
@ -510,7 +535,7 @@ of SHAKE clusters.</p>
</div>
<div class="section" id="default">
<h2>Default<a class="headerlink" href="#default" title="Permalink to this headline"></a></h2>
<p>The default keyword value is offset 0 0 0 0 0.</p>
<p>The default keywords values are offset 0 0 0 0 0 and scale = 1.0.</p>
</div>
</div>

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@ -10,26 +10,41 @@ molecule command :h3
[Syntax:]
molecule ID file1 file2 ... keyword values ... :pre
molecule ID file1 keyword values ... file2 keyword values ... fileN ... :pre
ID = user-assigned name for the molecule template :ulb,l
file1,file2,... = names of files containing molecule descriptions :l
zero or more keyword/value pairs may be appended :l
keyword = {offset} :l
{offset} values = toff boff aoff doff ioff
toff = offset to add to atom types
boff = offset to add to bond types
aoff = offset to add to angle types
doff = offset to add to dihedral types
ioff = offset to add to improper types :pre
zero or more keyword/value pairs may be appended after each file :l
keyword = {offset} or {toff} or {boff} or {aoff} or {doff} or {ioff} or {scale} :l
{offset} values = Toff Boff Aoff Doff Ioff
Toff = offset to add to atom types
Boff = offset to add to bond types
Aoff = offset to add to angle types
Doff = offset to add to dihedral types
Ioff = offset to add to improper types
{toff} value = Toff
Toff = offset to add to atom types
{boff} value = Boff
Boff = offset to add to bond types
{aoff} value = Aoff
Aoff = offset to add to angle types
{doff} value = Doff
Doff = offset to add to dihedral types
{ioff} value = Ioff
Ioff = offset to add to improper types
{scale} value = sfactor
sfactor = scale factor to apply to the size and mass of the molecule :pre
:ule
[Examples:]
molecule 1 mymol
molecule 1 mymol.txt
molecule 1 co2.txt h2o.txt
molecule CO2 co2.txt
molecule 1 mymol offset 6 9 18 23 14 :pre
molecule CO2 co2.txt boff 3 aoff 2
molecule 1 mymol.txt offset 6 9 18 23 14
molecule objects file.1 scale 1.5 file.1 scale 2.0 file.2 scale 1.3 :pre
:pre
[Description:]
@ -50,25 +65,39 @@ The ID of a molecule template can only contain alphanumeric characters
and underscores.
A single template can contain multiple molecules, listed one per file.
Many of the commands listed above currently use only the first
Some of the commands listed above currently use only the first
molecule in the template, and will issue a warning if the template
contains multiple molecules. The "atom_style
template"_atom_style.html command allows multiple-molecule templates
to define a system with more than one templated molecule.
The optional {offset} keyword adds the specified offset values to the
atom types, bond types, angle types, dihedral types, and improper
types as they are read from the molecule file. E.g. if {toff} = 2,
and the file uses atom types 1,2,3, then each created molecule will
have atom types 3,4,5. This is to make it easy to use the same
molecule template file in different simulations. Note that the same
offsets are applied to the molecules in all specified files. All five
offset values must be speicified, but individual values will be
ignored if the molecule template does not use that attribute (e.g. no
bonds).
Each filename can be followed by optional keywords which are applied
only to the molecule in the file as used in this template. This is to
make it easy to use the same molecule file in different molecule
templates or in different simulations. You can specify the same file
multiple times with different optional keywords.
IMPORTANT NOTE: This command can be used to define molecules with
bonds, angles, dihedrals, imporopers, or special bond lists of
The {offset}, {toff}, {aoff}, {doff}, {ioff} keywords add the
specified offset values to the atom types, bond types, angle types,
dihedral types, and/or improper types as they are read from the
molecule file. E.g. if {toff} = 2, and the file uses atom types
1,2,3, then each created molecule will have atom types 3,4,5. For the
{offset} keyword, all five offset values must be specified, but
individual values will be ignored if the molecule template does not
use that attribute (e.g. no bonds).
The {scale} keyword scales the size of the molecule. This can be
useful for modeling polydisperse granular rigid bodies. The scale
factor is applied to each of these properties in the molecule file, if
they are defined: the individual particle coordinates (Coords
section), the individual mass of each particle (Masses section), the
individual diameters of each particle (Diameters section), the total
mass of the molecule (header keyword = mass), the center-of-mass of
the molecule (header keyword = com), and the moments of inertia of the
molecule (header keyword = inertia).
IMPORTANT NOTE: The molecule command can be used to define molecules
with bonds, angles, dihedrals, imporopers, or special bond lists of
neighbors within a molecular topology, so that you can later add the
molecules to your simulation, via one or more of the commands listed
above. If such molecules do not already exist when LAMMPS creates the
@ -431,4 +460,4 @@ of SHAKE clusters.
[Default:]
The default keyword value is offset 0 0 0 0 0.
The default keywords values are offset 0 0 0 0 0 and scale = 1.0.

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