data_Mg2GeIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.27
_cell_length_b   3.27
_cell_length_c   6.74
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2GeIr
_chemical_formula_sum   'Mg2 Ge1 Ir1'
_cell_volume   72.01
_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  0.0  0.48  1.0
  Mg  Mg3  1  0.63  0.63  0.92  1.0
  Ge  Ge0  1  0.0  0.0  0.65  1.0
  Ir  Ir1  1  0.63  0.63  0.8  1.0

data_Mg2GeIr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.62
_cell_length_b   4.62
_cell_length_c   6.74
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2GeIr
_chemical_formula_sum   'Mg4 Ge2 Ir2'
_cell_volume   144.02
_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  0.48  1.0
  Mg  Mg1  2  0.13  0.5  0.92  1.0
  Ge  Ge2  2  0.0  0.0  0.65  1.0
  Ir  Ir3  2  0.13  0.5  0.8  1.0

Mg Mg Ge Ir
MgIrMgGe crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two MgGe clusters and two MgIr clusters. In each MgGe cluster, Mg(1) is bonded in a single-bond geometry to one Ge(1) atom. The Mg(1)-Ge(1) bond length is 1.16 Å. Ge(1) is bonded in a distorted single-bond geometry to one Mg(1) atom. In each MgIr cluster, Mg(2) is bonded in a single-bond geometry to one Ir(1) atom. The Mg(2)-Ir(1) bond length is 0.78 Å. Ir(1) is bonded in a single-bond geometry to one Mg(2) atom.