data_Ni2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.35
_cell_length_b   4.35
_cell_length_c   4.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   62.68
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ni2Ge
_chemical_formula_sum   'Ni4 Ge2'
_cell_volume   71.72
_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
  Ni  Ni2  1  0.46  0.81  0.07  1.0
  Ni  Ni3  1  0.97  0.19  0.2  1.0
  Ni  Ni4  1  0.97  0.81  0.07  1.0
  Ni  Ni5  1  0.46  0.19  0.2  1.0
  Ge  Ge0  1  0.71  0.65  0.07  1.0
  Ge  Ge1  1  0.71  0.35  0.2  1.0

data_Ni2Ge
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.27
_cell_length_b   4.35
_cell_length_c   4.35
_cell_angle_alpha   117.32
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Ni2Ge
_chemical_formula_sum   'Ni4 Ge2'
_cell_volume   71.72
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Ni  Ni0  2  0.43  0.24  0.81  1.0
  Ni  Ni1  2  0.43  0.76  0.81  1.0
  Ge  Ge2  2  0.43  0.5  0.65  1.0

Ni Ni Ni Ni Ge Ge
Ni2Ge crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two Ni2Ge clusters. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a single-bond geometry to one Ge(1) atom. The Ni(1)-Ge(1) bond length is 1.00 Å. In the second Ni site, Ni(2) is bonded in a 1-coordinate geometry to one Ge(1) atom. The Ni(2)-Ge(1) bond length is 1.54 Å. Ge(1) is bonded in a 1-coordinate geometry to one Ni(1) and one Ni(2) atom.