fully integrate acks2/reaxff fix into documentation build
This commit is contained in:
@ -23,6 +23,7 @@ OPT.
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:columns: 5
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:columns: 5
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* :doc:`accelerate/cos <fix_accelerate_cos>`
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* :doc:`accelerate/cos <fix_accelerate_cos>`
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* :doc:`acks2/reaxff (k) <fix_acks2_reaxff>`
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* :doc:`adapt <fix_adapt>`
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* :doc:`adapt <fix_adapt>`
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* :doc:`adapt/fep <fix_adapt_fep>`
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* :doc:`adapt/fep <fix_adapt_fep>`
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* :doc:`addforce <fix_addforce>`
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* :doc:`addforce <fix_addforce>`
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@ -166,6 +166,7 @@ page are followed by one or more of (g,i,k,o,t) to indicate which
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accelerated styles exist.
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accelerated styles exist.
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* :doc:`accelerate/cos <fix_accelerate_cos>` - apply cosine-shaped acceleration to atoms
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* :doc:`accelerate/cos <fix_accelerate_cos>` - apply cosine-shaped acceleration to atoms
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* :doc:`acks2/reaxff <fix_acks2_reaxff>` - apply ACKS2 charge equilibration
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* :doc:`adapt <fix_adapt>` - change a simulation parameter over time
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* :doc:`adapt <fix_adapt>` - change a simulation parameter over time
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* :doc:`adapt/fep <fix_adapt_fep>` - enhanced version of fix adapt
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* :doc:`adapt/fep <fix_adapt_fep>` - enhanced version of fix adapt
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* :doc:`addforce <fix_addforce>` - add a force to each atom
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* :doc:`addforce <fix_addforce>` - add a force to each atom
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@ -1,9 +1,8 @@
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.. index:: fix acks2/reaxff
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.. index:: fix acks2/reaxff
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.. index:: fix acks2/reaxff/kk
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.. index:: fix acks2/reaxff/kk
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fix acks2/reaxff command
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fix acks2/reaxff command
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====================
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========================
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Accelerator Variants: *acks2/reaxff/kk*
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Accelerator Variants: *acks2/reaxff/kk*
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@ -35,45 +34,46 @@ Description
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Perform the atom-condensed Kohn-Sham DFT to second order (ACKS2) charge
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Perform the atom-condensed Kohn-Sham DFT to second order (ACKS2) charge
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equilibration method as described in :ref:`(Verstraelen) <Verstraelen>`.
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equilibration method as described in :ref:`(Verstraelen) <Verstraelen>`.
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ACKS2 impedes unphysical long-range charge transfer sometimes seen with
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ACKS2 impedes unphysical long-range charge transfer sometimes seen with
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QEq (e.g. for dissociation of molecules), at increased computational cost.
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QEq (e.g. for dissociation of molecules), at increased computational
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It is typically used in conjunction with the ReaxFF force field model as
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cost. It is typically used in conjunction with the ReaxFF force field
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implemented in the :doc:`pair_style reaxff <pair_reaxff>` command, but
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model as implemented in the :doc:`pair_style reaxff <pair_reaxff>`
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it can be used with any potential in LAMMPS, so long as it defines and
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command, but it can be used with any potential in LAMMPS, so long as it
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uses charges on each atom. For more technical details about the
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defines and uses charges on each atom. For more technical details about
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charge equilibration performed by fix acks2/reaxff, see the
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the charge equilibration performed by fix acks2/reaxff, see the
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:ref:`(O'Hearn) <O'Hearn>` paper.
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:ref:`(O'Hearn) <O'Hearn>` paper.
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The ACKS2 method minimizes the electrostatic energy of the system by
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The ACKS2 method minimizes the electrostatic energy of the system by
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adjusting the partial charge on individual atoms based on interactions
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adjusting the partial charge on individual atoms based on interactions
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with their neighbors. It requires some parameters
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with their neighbors. It requires some parameters for each atom type.
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for each atom type.
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If the *params* setting above is the word "reaxff", then these are
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If the *params* setting above is the word "reaxff", then these are
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extracted from the :doc:`pair_style reaxff <pair_reaxff>` command and
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extracted from the :doc:`pair_style reaxff <pair_reaxff>` command and
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the ReaxFF force field file it reads in. If a file name is specified
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the ReaxFF force field file it reads in. If a file name is specified
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for *params*\ , then the parameters are taken from the specified file
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for *params*\ , then the parameters are taken from the specified file
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and the file must contain one line for each atom type. The latter
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and the file must contain one line for each atom type. The latter form
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form must be used when performing QeQ with a non-ReaxFF potential.
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must be used when performing QeQ with a non-ReaxFF potential. The lines
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The lines should be formatted as follows:
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should be formatted as follows:
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.. parsed-literal::
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.. parsed-literal::
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bond_softness
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bond_softness
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itype chi eta gamma bcut
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itype chi eta gamma bcut
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where the first line is the global parameter *bond_softness*. The remaining
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where the first line is the global parameter *bond_softness*. The
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1 to Ntypes lines include *itype*, the atom type from 1 to Ntypes, *chi*, the
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remaining 1 to Ntypes lines include *itype*, the atom type from 1 to
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electronegativity in eV, *eta*, the self-Coulomb
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Ntypes, *chi*, the electronegativity in eV, *eta*, the self-Coulomb
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potential in eV, *gamma*, the valence orbital
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potential in eV, *gamma*, the valence orbital exponent, and *bcut*, the
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exponent, and *bcut*, the bond cutoff distance. Note that these 4 quantities are also in the ReaxFF
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bond cutoff distance. Note that these 4 quantities are also in the
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potential file, except that eta is defined here as twice the eta value
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ReaxFF potential file, except that eta is defined here as twice the eta
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in the ReaxFF file. Note that unlike the rest of LAMMPS, the units
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value in the ReaxFF file. Note that unlike the rest of LAMMPS, the units
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of this fix are hard-coded to be A, eV, and electronic charge.
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of this fix are hard-coded to be A, eV, and electronic charge.
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**Restart, fix_modify, output, run start/stop, minimize info:**
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**Restart, fix_modify, output, run start/stop, minimize info:**
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No information about this fix is written to :doc:`binary restart files <restart>`. No global scalar or vector or per-atom
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No information about this fix is written to :doc:`binary restart files
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quantities are stored by this fix for access by various :doc:`output commands <Howto_output>`. No parameter of this fix can be used
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<restart>`. No global scalar or vector or per-atom quantities are
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with the *start/stop* keywords of the :doc:`run <run>` command.
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stored by this fix for access by various :doc:`output commands
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<Howto_output>`. No parameter of this fix can be used with the
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*start/stop* keywords of the :doc:`run <run>` command.
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This fix is invoked during :doc:`energy minimization <minimize>`.
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This fix is invoked during :doc:`energy minimization <minimize>`.
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@ -86,12 +86,13 @@ This fix is invoked during :doc:`energy minimization <minimize>`.
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Restrictions
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Restrictions
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""""""""""""
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""""""""""""
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This fix is part of the REAXFF package. It is only enabled if
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This fix is part of the REAXFF package. It is only enabled if LAMMPS
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LAMMPS was built with that package. See the :doc:`Build package <Build_package>` doc page for more info.
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was built with that package. See the :doc:`Build package
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<Build_package>` doc page for more info.
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This fix does not correctly handle interactions
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This fix does not correctly handle interactions involving multiple
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involving multiple periodic images of the same atom. Hence, it should not
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periodic images of the same atom. Hence, it should not be used for
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be used for periodic cell dimensions less than 10 angstroms.
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periodic cell dimensions less than 10 angstroms.
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Related commands
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Related commands
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""""""""""""""""
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""""""""""""""""
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@ -104,7 +105,7 @@ Related commands
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.. _O'Hearn:
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.. _O'Hearn:
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**(O'Hearn)** O'Hearn, Alperen, Aktulga, SIAM J. Sci. Comput., 42(1), C1–C22 (2020).
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**(O'Hearn)** O'Hearn, Alperen, Aktulga, SIAM J. Sci. Comput., 42(1), C1-C22 (2020).
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.. _Verstraelen:
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.. _Verstraelen:
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@ -20,7 +20,7 @@ Syntax
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.. parsed-literal::
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.. parsed-literal::
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keyword = *checkqeq* or *lgvdw* or *safezone* or *mincap* or *minhbonds*
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keyword = *checkqeq* or *lgvdw* or *safezone* or *mincap* or *minhbonds*
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*checkqeq* value = *yes* or *no* = whether or not to require qeq/reaxff or acks2/reax fix
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*checkqeq* value = *yes* or *no* = whether or not to require qeq/reaxff or acks2/reaxff fix
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*enobonds* value = *yes* or *no* = whether or not to tally energy of atoms with no bonds
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*enobonds* value = *yes* or *no* = whether or not to tally energy of atoms with no bonds
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*lgvdw* value = *yes* or *no* = whether or not to use a low gradient vdW correction
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*lgvdw* value = *yes* or *no* = whether or not to use a low gradient vdW correction
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*safezone* = factor used for array allocation
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*safezone* = factor used for array allocation
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@ -119,7 +119,7 @@ The ReaxFF parameter files provided were created using a charge
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equilibration (QEq) model for handling the electrostatic interactions.
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equilibration (QEq) model for handling the electrostatic interactions.
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Therefore, by default, LAMMPS requires that either the
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Therefore, by default, LAMMPS requires that either the
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:doc:`fix qeq/reaxff <fix_qeq_reaxff>` or the
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:doc:`fix qeq/reaxff <fix_qeq_reaxff>` or the
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:doc:`fix qeq/shielded <fix_qeq>` or :doc:`fix acks2/reaxff <fix_acks2>`
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:doc:`fix qeq/shielded <fix_qeq>` or :doc:`fix acks2/reaxff <fix_acks2_reaxff>`
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command be used with
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command be used with
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*pair_style reaxff* when simulating a ReaxFF model, to equilibrate
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*pair_style reaxff* when simulating a ReaxFF model, to equilibrate
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the charges each timestep.
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the charges each timestep.
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@ -129,7 +129,7 @@ for the QEq fixes, allowing a simulation to be run without charge
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equilibration. In this case, the static charges you assign to each
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equilibration. In this case, the static charges you assign to each
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atom will be used for computing the electrostatic interactions in
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atom will be used for computing the electrostatic interactions in
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the system. See the :doc:`fix qeq/reaxff <fix_qeq_reaxff>` or
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the system. See the :doc:`fix qeq/reaxff <fix_qeq_reaxff>` or
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:doc:`fix qeq/shielded <fix_qeq>` or :doc:`fix acks2/reaxff <fix_acks2>`
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:doc:`fix qeq/shielded <fix_qeq>` or :doc:`fix acks2/reaxff <fix_acks2_reaxff>`
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command documentation for more details.
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command documentation for more details.
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Using the optional keyword *lgvdw* with the value *yes* turns on the
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Using the optional keyword *lgvdw* with the value *yes* turns on the
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@ -354,7 +354,7 @@ Related commands
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""""""""""""""""
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""""""""""""""""
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:doc:`pair_coeff <pair_coeff>`, :doc:`fix qeq/reaxff <fix_qeq_reaxff>`,
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:doc:`pair_coeff <pair_coeff>`, :doc:`fix qeq/reaxff <fix_qeq_reaxff>`,
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:doc:`fix acks2/reax <fix_acks2_reax>`, :doc:`fix reaxff/bonds <fix_reaxff_bonds>`,
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:doc:`fix acks2/reaxff <fix_acks2_reaxff>`, :doc:`fix reaxff/bonds <fix_reaxff_bonds>`,
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:doc:`fix reaxff/species <fix_reaxff_species>`
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:doc:`fix reaxff/species <fix_reaxff_species>`
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Default
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Default
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@ -254,7 +254,7 @@ for command_type, entries in index.items():
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print("Total number of style index entries:", total_index)
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print("Total number of style index entries:", total_index)
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skip_fix = ('python', 'NEIGH_HISTORY/omp','qeq/reax','reax/c/bonds','reax/c/species')
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skip_fix = ('python', 'NEIGH_HISTORY/omp','acks2/reax','qeq/reax','reax/c/bonds','reax/c/species')
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skip_pair = ('meam/c','lj/sf','reax/c')
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skip_pair = ('meam/c','lj/sf','reax/c')
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counter = 0
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counter = 0
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@ -282,7 +282,7 @@ if counter:
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counter = 0
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counter = 0
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counter += check_style_index("compute", compute, index["compute"])
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counter += check_style_index("compute", compute, index["compute"])
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counter += check_style_index("fix", fix, index["fix"], skip=['python','qeq/reax','reax/c/bonds','reax/c/species'])
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counter += check_style_index("fix", fix, index["fix"], skip=['python','acks2/reax','qeq/reax','reax/c/bonds','reax/c/species'])
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counter += check_style_index("angle_style", angle, index["angle_style"])
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counter += check_style_index("angle_style", angle, index["angle_style"])
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counter += check_style_index("bond_style", bond, index["bond_style"])
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counter += check_style_index("bond_style", bond, index["bond_style"])
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counter += check_style_index("dihedral_style", dihedral, index["dihedral_style"])
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counter += check_style_index("dihedral_style", dihedral, index["dihedral_style"])
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@ -19,6 +19,7 @@ accuracies
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ach
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ach
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ackland
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ackland
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Ackland
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Ackland
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acks
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acolor
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acolor
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acos
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acos
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Acta
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Acta
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@ -77,6 +78,7 @@ allocators
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allosws
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allosws
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AlO
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AlO
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Alonso
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Alonso
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Alperen
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alphak
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alphak
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alphashrink
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alphashrink
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amap
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amap
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@ -1252,6 +1254,7 @@ hbond
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hcp
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hcp
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hdnnp
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hdnnp
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HDNNP
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HDNNP
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Hearn
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heatconduction
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heatconduction
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Hebbeker
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Hebbeker
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Hebenstreit
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Hebenstreit
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@ -3074,6 +3077,7 @@ Spearot
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specular
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specular
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spellcheck
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spellcheck
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Spellmeyer
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Spellmeyer
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Speybroeck
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sph
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sph
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SPH
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SPH
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Spickermann
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Spickermann
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@ -3486,6 +3490,7 @@ Verlag
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verlet
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verlet
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Verlet
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Verlet
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versa
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versa
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Verstraelen
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ves
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ves
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vflag
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vflag
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vhi
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vhi
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@ -3552,6 +3557,7 @@ vzcm
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vzi
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vzi
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Waals
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Waals
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Wadley
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Wadley
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Waroquier
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wallstyle
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wallstyle
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walltime
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walltime
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Waltham
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Waltham
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