data_HgAs2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.19
_cell_length_b   3.19
_cell_length_c   9.58
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   116.26
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgAs2Se
_chemical_formula_sum   'Hg1 As2 Se1'
_cell_volume   87.62
_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
  Hg  Hg2  1  0.0  0.0  0.79  1.0
  As  As0  1  0.69  0.0  0.1  1.0
  As  As1  1  0.69  0.0  0.47  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0

data_HgAs2Se
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.19
_cell_length_b   3.19
_cell_length_c   9.58
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   116.26
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgAs2Se
_chemical_formula_sum   'Hg1 As2 Se1'
_cell_volume   87.62
_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
  Hg  Hg0  1  0.0  0.0  0.79  1.0
  As  As1  1  0.69  0.0  0.1  1.0
  As  As2  1  0.69  0.0  0.47  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0

Hg As As Se