data_Mg2AlBi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.46
_cell_length_b   5.46
_cell_length_c   5.46
_cell_angle_alpha   129.83
_cell_angle_beta   129.83
_cell_angle_gamma   73.67
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2AlBi
_chemical_formula_sum   'Mg2 Al1 Bi1'
_cell_volume   93.7
_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
  Mg  Mg2  1  0.0  0.32  0.19  1.0
  Mg  Mg3  1  0.32  0.0  0.19  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Bi  Bi1  1  0.0  0.0  0.37  1.0

data_Mg2AlBi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.55
_cell_length_b   6.55
_cell_length_c   5.46
_cell_angle_alpha   90.0
_cell_angle_beta   126.84
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2AlBi
_chemical_formula_sum   'Mg4 Al2 Bi2'
_cell_volume   187.4
_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
  Mg  Mg0  4  0.47  0.34  0.13  1.0
  Al  Al1  2  0.0  0.0  0.0  1.0
  Bi  Bi2  2  0.13  0.5  0.63  1.0

Mg Mg Al Bi
Mg Mg Al Bi 0 2 o o o 0 3 o o o 1 2 o o o 1 3 o o o 2 3 o o o 