data_MgSn2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.39
_cell_length_b   3.39
_cell_length_c   8.33
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgSn2Ge
_chemical_formula_sum   'Mg1 Sn2 Ge1'
_cell_volume   95.45
_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  Mg1  1  0.0  0.0  0.0  1.0
  Sn  Sn2  1  0.69  0.69  0.12  1.0
  Sn  Sn3  1  0.69  0.69  0.21  1.0
  Ge  Ge0  1  0.0  0.0  0.16  1.0

data_MgSn2Ge
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.79
_cell_length_b   4.79
_cell_length_c   8.33
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgSn2Ge
_chemical_formula_sum   'Mg2 Sn4 Ge2'
_cell_volume   190.91
_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  0.0  1.0
  Sn  Sn1  2  0.19  0.5  0.12  1.0
  Sn  Sn2  2  0.19  0.5  0.21  1.0
  Ge  Ge3  2  0.0  0.0  0.16  1.0

Mg Sn Sn Ge
MgGe(Sn)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two distannene molecules and two MgGe clusters. In each MgGe cluster, Mg(1) is bonded in a distorted single-bond geometry to one Ge(1) atom. The Mg(1)-Ge(1) bond length is 1.36 Å. Ge(1) is bonded in a single-bond geometry to one Mg(1) atom.