data_HfGeP2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.43
_cell_length_b   4.43
_cell_length_c   3.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfGeP2
_chemical_formula_sum   'Hf1 Ge1 P2'
_cell_volume   66.49
_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  0.22  0.22  0.0  1.0
  Ge  Ge0  1  0.0  0.0  0.0  1.0
  P  P2  1  0.22  0.0  0.69  1.0
  P  P3  1  0.0  0.22  0.69  1.0

data_HfGeP2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.27
_cell_length_b   6.27
_cell_length_c   3.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfGeP2
_chemical_formula_sum   'Hf2 Ge2 P4'
_cell_volume   132.99
_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  0.22  0.0  -0.0  1.0
  Ge  Ge1  2  0.0  0.0  0.0  1.0
  P  P2  4  0.11  0.11  0.69  1.0

Hf Ge P P
HfGeP2 is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two HfGeP2 clusters. Hf(1) is bonded in a 3-coordinate geometry to one Ge(1) and two equivalent P(1) atoms. The Hf(1)-Ge(1) bond length is 1.35 Å. Both Hf(1)-P(1) bond lengths are 1.41 Å. Ge(1) is bonded in a distorted single-bond geometry to one Hf(1) and two equivalent P(1) atoms. Both Ge(1)-P(1) bond lengths are 1.41 Å. P(1) is bonded in a 3-coordinate geometry to one Hf(1), one Ge(1), and one P(1) atom. The P(1)-P(1) bond length is 1.35 Å.