data_Bi3HSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.93
_cell_length_b   4.93
_cell_length_c   4.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Bi3HSe
_chemical_formula_sum   'Bi3 H1 Se1'
_cell_volume   119.49
_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
  Bi  Bi1  1  0.0  0.46  0.0  1.0
  Bi  Bi2  1  0.0  0.0  0.46  1.0
  Bi  Bi3  1  0.46  0.0  0.0  1.0
  H  H0  1  0.0  0.0  0.0  1.0
  Se  Se4  1  0.46  0.46  0.46  1.0

data_Bi3HSe
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.97
_cell_length_b   6.97
_cell_length_c   8.53
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Bi3HSe
_chemical_formula_sum   'Bi9 H3 Se3'
_cell_volume   358.46
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Bi  Bi0  9  0.18  0.36  0.82  1.0
  H  H1  3  0.0  0.0  0.0  1.0
  Se  Se2  3  0.0  0.0  0.46  1.0

Bi Bi Bi H Se
Bi Bi Bi H Se 0 3 o o o 0 3 o + o 0 4 o o o 0 4 o o - 0 4 - o o 0 4 - o - 1 3 o o o 1 3 o o + 1 4 o o o 1 4 o - o 1 4 - o o 1 4 - - o 2 3 o o o 2 3 + o o 2 4 o o o 2 4 o o - 2 4 o - o 2 4 o - - 3 4 o o o 
Bi3HSe is (Cubic) Perovskite structured and crystallizes in the trigonal R3m space group. The structure is zero-dimensional and consists of three Bi3HSe clusters. Bi(1) is bonded in a distorted L-shaped geometry to one H(1) and one Se(1) atom. The Bi(1)-H(1) bond length is 2.28 Å. The Bi(1)-Se(1) bond length is 3.22 Å. H(1) is bonded in a distorted T-shaped geometry to three equivalent Bi(1) atoms. Se(1) is bonded in a 3-coordinate geometry to three equivalent Bi(1) atoms.