data_MgGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.01
_cell_length_b   3.11
_cell_length_c   5.0
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgGe
_chemical_formula_sum   'Mg2 Ge2'
_cell_volume   78.06
_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  Mg2  1  0.76  0.0  0.41  1.0
  Mg  Mg3  1  0.25  0.0  0.59  1.0
  Ge  Ge0  1  0.76  0.56  0.93  1.0
  Ge  Ge1  1  0.25  0.56  0.07  1.0

data_MgGe
_symmetry_space_group_name_H-M   Pma2
_cell_length_a   5.01
_cell_length_b   5.0
_cell_length_c   3.11
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   28
_chemical_formula_structural   MgGe
_chemical_formula_sum   'Mg2 Ge2'
_cell_volume   78.06
_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, z'
  4  'x+1/2, -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  2  0.25  0.59  0.0  1.0
  Ge  Ge1  2  0.25  0.07  0.56  1.0

Mg Mg Ge Ge
Mg Mg Ge Ge 0 3 o - o 0 3 + - o 0 1 o o o 0 1 + o o 0 2 o - - 0 2 o - o 0 2 o o - 0 2 o o o 0 0 o + o 1 2 - - o 1 2 o - o 1 3 o - o 1 3 o - + 1 3 o o o 1 3 o o + 1 1 o + o 2 3 o o + 2 3 + o + 2 2 o + o 3 3 o + o 
MgGe is beta-prime cadmium gold structured and crystallizes in the monoclinic P2 space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Ge(1) atoms. There is one shorter (2.64 Å) and one longer (2.70 Å) Mg(1)-Mg(1) bond length. There are a spread of Mg(1)-Ge(1) bond distances ranging from 2.74-3.15 Å. Ge(1) is bonded in a 6-coordinate geometry to four equivalent Mg(1) and two equivalent Ge(1) atoms. There is one shorter (2.56 Å) and one longer (2.62 Å) Ge(1)-Ge(1) bond length.