data_HfGePt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.53
_cell_length_b   3.53
_cell_length_c   5.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfGePt2
_chemical_formula_sum   'Hf1 Ge1 Pt2'
_cell_volume   70.84
_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
  Hf  Hf1  1  0.77  0.77  0.44  1.0
  Ge  Ge0  1  0.0  0.0  0.52  1.0
  Pt  Pt2  1  0.0  0.0  0.57  1.0
  Pt  Pt3  1  0.77  0.77  0.67  1.0

data_HfGePt2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.99
_cell_length_b   4.99
_cell_length_c   5.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfGePt2
_chemical_formula_sum   'Hf2 Ge2 Pt4'
_cell_volume   141.68
_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
  Hf  Hf0  2  0.27  0.5  0.44  1.0
  Ge  Ge1  2  0.0  0.0  0.52  1.0
  Pt  Pt2  2  0.0  0.0  0.57  1.0
  Pt  Pt3  2  0.27  0.5  0.67  1.0

Hf Ge Pt Pt
Hf Ge Pt Pt 0 2 + + o 0 1 + + o 0 3 o o o 1 2 o o o 1 3 - - o 2 3 - - o 
HfPt2Ge crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two HfPt2Ge clusters. Hf(1) is bonded in a 2-coordinate geometry to one Pt(2) and one Ge(1) atom. The Hf(1)-Pt(2) bond length is 1.27 Å. The Hf(1)-Ge(1) bond length is 1.24 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a single-bond geometry to one Ge(1) atom. The Pt(1)-Ge(1) bond length is 0.33 Å. In the second Pt site, Pt(2) is bonded in a single-bond geometry to one Hf(1) atom. Ge(1) is bonded in a distorted single-bond geometry to one Hf(1) and one Pt(1) atom.