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lammps/examples/body/molecule.tetra

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# 3d polygon body: regular tetrahedra, moment of inertia I = m edge^2/ 20
1 atoms
3 47 body
Coords
1 0 0 0
Types
1 1
Masses
1 1.0
Body Integers
4 6 4
Body Doubles
0.4 0.4 0.4 0 0 0
1 1 1
1 -1 -1
-1 1 -1
-1 -1 1
0 1
0 2
0 3
1 2
2 3
3 1
0 1 2 -1
0 1 3 -1
0 2 3 -1
1 2 3 -1
0.5