Data items in the SYMMETRY_EQUIV category list the symmetry-equivalent positions for the space group.
loop_ _symmetry_equiv.id _symmetry_equiv.pos_as_xyz 1 '+x,+y,+z' 2 '-x,-y,z' 3 '1/2+x,1/2-y,-z' 4 '1/2-x,1/2+y,-z'