data_MgAlBi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.89
_cell_length_b   3.89
_cell_length_c   7.32
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgAlBi2
_chemical_formula_sum   'Mg1 Al1 Bi2'
_cell_volume   110.58
_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  Mg3  1  0.0  0.0  0.75  1.0
  Al  Al0  1  0.94  0.94  0.41  1.0
  Bi  Bi1  1  0.0  0.0  0.69  1.0
  Bi  Bi2  1  0.94  0.94  0.45  1.0

data_MgAlBi2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.5
_cell_length_b   5.5
_cell_length_c   7.32
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgAlBi2
_chemical_formula_sum   'Mg2 Al2 Bi4'
_cell_volume   221.16
_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  2  0.0  0.0  0.75  1.0
  Al  Al1  2  0.44  0.5  0.41  1.0
  Bi  Bi2  2  0.0  0.0  0.69  1.0
  Bi  Bi3  2  0.44  0.5  0.45  1.0

Mg Al Bi Bi
Mg Al Bi Bi 0 2 o o o 1 3 o o o 
MgBiAlBi is Cubic alpha N2-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two aluminum;bismuth molecules and two magnesio-bismuthin molecules.