data_NbSi2Bi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.38
_cell_length_b   3.38
_cell_length_c   6.83
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbSi2Bi
_chemical_formula_sum   'Nb1 Si2 Bi1'
_cell_volume   78.18
_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
  Nb  Nb1  1  0.0  0.0  0.0  1.0
  Si  Si2  1  0.69  0.69  0.22  1.0
  Si  Si3  1  0.69  0.69  0.61  1.0
  Bi  Bi0  1  0.0  0.0  0.42  1.0

data_NbSi2Bi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.78
_cell_length_b   4.78
_cell_length_c   6.83
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NbSi2Bi
_chemical_formula_sum   'Nb2 Si4 Bi2'
_cell_volume   156.36
_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
  Nb  Nb0  2  0.0  0.0  0.0  1.0
  Si  Si1  2  0.19  0.5  0.22  1.0
  Si  Si2  2  0.19  0.5  0.61  1.0
  Bi  Bi3  2  0.0  0.0  0.42  1.0

Nb Si Si Bi
Nb Si Si Bi 0 1 - - o 1 3 + + o 2 3 + + o 