data_SnP
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.31
_cell_length_b   3.31
_cell_length_c   10.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SnP
_chemical_formula_sum   'Sn2 P2'
_cell_volume   103.58
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Sn  Sn2  1  0.65  0.95  0.13  1.0
  Sn  Sn3  1  0.0  0.91  0.81  1.0
  P  P0  1  0.65  0.95  0.33  1.0
  P  P1  1  0.0  0.91  0.61  1.0

data_SnP
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.31
_cell_length_b   3.31
_cell_length_c   10.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   SnP
_chemical_formula_sum   'Sn2 P2'
_cell_volume   103.58
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Sn  Sn0  2  0.33  0.52  0.66  1.0
  P  P1  2  0.33  0.52  0.86  1.0

Sn Sn P P