data_Sn2GeRu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.2
_cell_length_b   3.2
_cell_length_c   7.85
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sn2GeRu
_chemical_formula_sum   'Sn2 Ge1 Ru1'
_cell_volume   80.44
_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
  Sn  Sn2  1  0.6  0.6  0.59  1.0
  Sn  Sn3  1  0.6  0.6  0.26  1.0
  Ge  Ge0  1  0.0  0.0  0.0  1.0
  Ru  Ru1  1  0.0  0.0  0.92  1.0

data_Sn2GeRu
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.53
_cell_length_b   4.53
_cell_length_c   7.85
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sn2GeRu
_chemical_formula_sum   'Sn4 Ge2 Ru2'
_cell_volume   160.89
_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
  Sn  Sn0  2  0.1  0.5  0.26  1.0
  Sn  Sn1  2  0.1  0.5  0.59  1.0
  Ge  Ge2  2  0.0  0.0  0.0  1.0
  Ru  Ru3  2  0.0  0.0  0.92  1.0

Sn Sn Ge Ru
RuSn2Ge crystallizes in the monoclinic Cm space group. Ru(1) is bonded in a single-bond geometry to three equivalent Sn(1) and one Ge(1) atom. There is one shorter (3.19 Å) and two longer (3.50 Å) Ru(1)-Sn(1) bond lengths. The Ru(1)-Ge(1) bond length is 0.59 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to three equivalent Ru(1), one Sn(2), and four equivalent Sn(1) atoms. The Sn(1)-Sn(2) bond length is 2.58 Å. All Sn(1)-Sn(1) bond lengths are 3.20 Å. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to one Sn(1), four equivalent Sn(2), and three equivalent Ge(1) atoms. All Sn(2)-Sn(2) bond lengths are 3.20 Å. There is one shorter (2.73 Å) and two longer (3.08 Å) Sn(2)-Ge(1) bond lengths. Ge(1) is bonded in a single-bond geometry to one Ru(1) and three equivalent Sn(2) atoms.