data_SnHgAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.5
_cell_length_b   6.5
_cell_length_c   6.5
_cell_angle_alpha   148.21
_cell_angle_beta   148.21
_cell_angle_gamma   45.58
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SnHgAs
_chemical_formula_sum   'Sn1 Hg1 As1'
_cell_volume   76.1
_cell_formula_units_Z   1
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  0.0  0.0  0.71  1.0
  Hg  Hg1  1  0.0  0.0  0.07  1.0
  As  As0  1  0.0  0.0  0.22  1.0

data_SnHgAs
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.04
_cell_length_b   5.04
_cell_length_c   6.5
_cell_angle_alpha   90.0
_cell_angle_beta   112.79
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SnHgAs
_chemical_formula_sum   'Sn2 Hg2 As2'
_cell_volume   152.2
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.21  0.5  0.71  1.0
  Hg  Hg1  2  0.07  0.0  0.07  1.0
  As  As2  2  0.22  0.0  0.22  1.0

Sn Hg As
Sn Hg As 0 1 o o + 1 2 o o o 