data_HfAs2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.4
_cell_length_b   3.4
_cell_length_c   6.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfAs2Pt
_chemical_formula_sum   'Hf1 As2 Pt1'
_cell_volume   70.87
_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  Hf2  1  0.0  0.0  0.0  1.0
  As  As0  1  0.7  0.7  0.68  1.0
  As  As1  1  0.7  0.7  0.47  1.0
  Pt  Pt3  1  0.0  0.0  0.07  1.0

data_HfAs2Pt
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.8
_cell_length_b   4.8
_cell_length_c   6.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfAs2Pt
_chemical_formula_sum   'Hf2 As4 Pt2'
_cell_volume   141.74
_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  0.0  0.0  0.0  1.0
  As  As1  2  0.2  0.5  0.47  1.0
  As  As2  2  0.2  0.5  0.68  1.0
  Pt  Pt3  2  0.0  0.0  0.07  1.0

Hf As As Pt
HfPtAs2 crystallizes in the monoclinic Cm space group. Hf(1) is bonded in a single-bond geometry to one Pt(1) and three equivalent As(1) atoms. The Hf(1)-Pt(1) bond length is 0.46 Å. There is one shorter (2.45 Å) and two longer (3.25 Å) Hf(1)-As(1) bond lengths. Pt(1) is bonded in a single-bond geometry to one Hf(1) and one As(2) atom. The Pt(1)-As(2) bond length is 2.83 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 4-coordinate geometry to three equivalent Hf(1) and one As(2) atom. The As(1)-As(2) bond length is 1.29 Å. In the second As site, As(2) is bonded in a bent 150 degrees geometry to one Pt(1) and one As(1) atom.