The crystal structure described by Mg2Ge crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 14-coordinate geometry to two equivalent Mg(1), six equivalent Mg(2), and six equivalent Ge(1) atoms. In the second Mg site, Mg(2) is bonded to six equivalent Mg(1) and five equivalent Ge(1) atoms to form a mixture of distorted corner and face-sharing MgMg6Ge5 trigonal bipyramids. Ge(1) is bonded in a 11-coordinate geometry to five equivalent Mg(2) and six equivalent Mg(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.737
_cell_length_b   4.737
_cell_length_c   6.099
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   118.512
_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  0.000  0.000  0.500  1.0
  Mg  Mg1  1  0.000  0.000  0.000  1.0
  Mg  Mg2  1  0.333  0.667  0.750  1.0
  Mg  Mg3  1  0.667  0.333  0.250  1.0
  Ge  Ge4  1  0.333  0.667  0.250  1.0
  Ge  Ge5  1  0.667  0.333  0.750  1.0
[/CIF]
.
The crystal structure described by Mg2Ge crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 14-coordinate geometry to two equivalent Mg(1), six equivalent Mg(2), and six equivalent Ge(1) atoms. In the second Mg site, Mg(2) is bonded to six equivalent Mg(1) and five equivalent Ge(1) atoms to form a mixture of distorted corner and face-sharing MgMg6Ge5 trigonal bipyramids. Ge(1) is bonded in a 11-coordinate geometry to five equivalent Mg(2) and six equivalent Mg(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.737
_cell_length_b   4.737
_cell_length_c   6.099
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   118.512
_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  0.000  0.000  0.500  1.0
  Mg  Mg1  1  0.000  0.000  0.000  1.0
  Mg  Mg2  1  0.333  0.667  0.750  1.0
  Mg  Mg3  1  0.667  0.333  0.250  1.0
  Ge  Ge4  1  0.333  0.667  0.250  1.0
  Ge  Ge5  1  0.667  0.333  0.750  1.0
[/CIF]
.