The structure described by BiMg2 crystallizes in the monoclinic Cm space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 3-coordinate geometry to one Bi(2) and two equivalent Bi(1) atoms. In the second Mg site, Mg(2) is bonded in a 5-coordinate geometry to two equivalent Bi(2) and three equivalent Bi(1) atoms. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to one Bi(1) and three equivalent Bi(2) atoms. In the fourth Mg site, Mg(4) is bonded in a 4-coordinate geometry to two equivalent Bi(1) and two equivalent Bi(2) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), and three equivalent Mg(2) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), and three equivalent Mg(3) atoms. is represented by the CIF file [CIF]
data_Mg2Bi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.266
_cell_length_b   6.266
_cell_length_c   7.847
_cell_angle_alpha   79.731
_cell_angle_beta   79.731
_cell_angle_gamma   31.177
_symmetry_Int_Tables_number   1
_cell_volume   156.723
_cell_formula_units_Z   2
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  Mg0  1  0.999  0.999  0.999  1.0
  Mg  Mg1  1  0.340  0.340  0.327  1.0
  Mg  Mg2  1  0.662  0.662  0.671  1.0
  Mg  Mg3  1  0.277  0.277  0.945  1.0
  Bi  Bi4  1  0.628  0.628  0.255  1.0
  Bi  Bi5  1  0.926  0.926  0.635  1.0
[/CIF]
.
The structure described by BiMg2 crystallizes in the monoclinic Cm space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 3-coordinate geometry to one Bi(2) and two equivalent Bi(1) atoms. In the second Mg site, Mg(2) is bonded in a 5-coordinate geometry to two equivalent Bi(2) and three equivalent Bi(1) atoms. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to one Bi(1) and three equivalent Bi(2) atoms. In the fourth Mg site, Mg(4) is bonded in a 4-coordinate geometry to two equivalent Bi(1) and two equivalent Bi(2) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), and three equivalent Mg(2) atoms. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), and three equivalent Mg(3) atoms. is represented by the CIF file [CIF]
data_Mg2Bi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.266
_cell_length_b   6.266
_cell_length_c   7.847
_cell_angle_alpha   79.731
_cell_angle_beta   79.731
_cell_angle_gamma   31.177
_symmetry_Int_Tables_number   1
_cell_volume   156.723
_cell_formula_units_Z   2
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  Mg0  1  0.999  0.999  0.999  1.0
  Mg  Mg1  1  0.340  0.340  0.327  1.0
  Mg  Mg2  1  0.662  0.662  0.671  1.0
  Mg  Mg3  1  0.277  0.277  0.945  1.0
  Bi  Bi4  1  0.628  0.628  0.255  1.0
  Bi  Bi5  1  0.926  0.926  0.635  1.0
[/CIF]
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