data_BeBiSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.95
_cell_length_b   5.95
_cell_length_c   5.95
_cell_angle_alpha   144.88
_cell_angle_beta   144.88
_cell_angle_gamma   50.52
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeBiSe
_chemical_formula_sum   'Be1 Bi1 Se1'
_cell_volume   69.5
_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
  Be  Be0  1  0.0  0.0  0.05  1.0
  Bi  Bi1  1  0.0  0.0  0.73  1.0
  Se  Se2  1  0.0  0.0  0.98  1.0

data_BeBiSe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.08
_cell_length_b   5.08
_cell_length_c   5.95
_cell_angle_alpha   90.0
_cell_angle_beta   115.26
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BeBiSe
_chemical_formula_sum   'Be2 Bi2 Se2'
_cell_volume   139.0
_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
  Be  Be0  2  0.05  0.0  0.05  1.0
  Bi  Bi1  2  0.23  0.5  0.73  1.0
  Se  Se2  2  0.48  0.5  0.98  1.0

Be Bi Se
BeBiSe is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two BeBiSe clusters. Be(1) is bonded in a single-bond geometry to one Se(1) atom. The Be(1)-Se(1) bond length is 0.39 Å. Bi(1) is bonded in a single-bond geometry to one Se(1) atom. The Bi(1)-Se(1) bond length is 1.49 Å. Se(1) is bonded in a distorted linear geometry to one Be(1) and one Bi(1) atom.