SYMM Instruction
SYMM symmetry operation
Symmetry operators, i.e. coordinates of the general positions as given in
International Tables. The operator x, y, z is always assumed, so MUST NOT be
input. If the structure is centrosymmetric, the origin MUST lie on a center
of symmetry. Lattice centering should be indicated by
LATT, not SYMM. The
symmetry operators may be specified using decimal or fractional numbers, e.g.
0.5-x, 0.5+y, -z or Y-X, -X, Z+1/6; the three components are separated by
commas.