data_ReGe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.79
_cell_length_b   4.79
_cell_length_c   4.79
_cell_angle_alpha   128.82
_cell_angle_beta   128.82
_cell_angle_gamma   75.31
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ReGe3
_chemical_formula_sum   'Re1 Ge3'
_cell_volume   64.78
_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
  Re  Re3  1  0.0  0.0  0.79  1.0
  Ge  Ge0  1  0.0  0.07  0.89  1.0
  Ge  Ge1  1  0.0  0.0  0.0  1.0
  Ge  Ge2  1  0.07  0.0  0.89  1.0

data_ReGe3
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.85
_cell_length_b   5.85
_cell_length_c   4.79
_cell_angle_alpha   90.0
_cell_angle_beta   127.65
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ReGe3
_chemical_formula_sum   'Re2 Ge6'
_cell_volume   129.57
_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
  Re  Re0  2  0.0  0.0  0.79  1.0
  Ge  Ge1  4  0.47  0.47  0.83  1.0
  Ge  Ge2  2  0.0  0.0  0.0  1.0

Re Ge Ge Ge
ReGe3 is Copper structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two ReGe3 clusters. Re(1) is bonded in a 2-coordinate geometry to two equivalent Ge(1) atoms. Both Re(1)-Ge(1) bond lengths are 0.39 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 2-coordinate geometry to one Re(1), one Ge(1), and one Ge(2) atom. The Ge(1)-Ge(1) bond length is 0.39 Å. The Ge(1)-Ge(2) bond length is 0.75 Å. In the second Ge site, Ge(2) is bonded in a 2-coordinate geometry to two equivalent Ge(1) atoms.