data_Si2NiBi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.53
_cell_length_b   3.57
_cell_length_c   5.94
_cell_angle_alpha   90.0
_cell_angle_beta   99.87
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2NiBi
_chemical_formula_sum   'Si2 Ni1 Bi1'
_cell_volume   73.76
_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
  Si  Si2  1  0.53  0.79  0.41  1.0
  Si  Si3  1  0.34  0.0  0.42  1.0
  Ni  Ni1  1  0.59  0.0  0.71  1.0
  Bi  Bi0  1  0.3  0.79  0.24  1.0

data_Si2NiBi
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.53
_cell_length_b   3.57
_cell_length_c   5.94
_cell_angle_alpha   90.0
_cell_angle_beta   99.87
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2NiBi
_chemical_formula_sum   'Si2 Ni1 Bi1'
_cell_volume   73.76
_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
  Si  Si0  1  0.34  0.0  0.42  1.0
  Si  Si1  1  0.53  0.79  0.41  1.0
  Ni  Ni2  1  0.59  0.0  0.71  1.0
  Bi  Bi3  1  0.3  0.79  0.24  1.0

Si Si Ni Bi