data_HfTeAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.91
_cell_length_b   4.91
_cell_length_c   3.48
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfTeAs2
_chemical_formula_sum   'Hf1 Te1 As2'
_cell_volume   83.8
_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  0.45  0.45  0.0  1.0
  Te  Te3  1  0.0  0.0  0.0  1.0
  As  As0  1  0.0  0.45  0.74  1.0
  As  As1  1  0.45  0.0  0.74  1.0

data_HfTeAs2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.94
_cell_length_b   6.94
_cell_length_c   3.48
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfTeAs2
_chemical_formula_sum   'Hf2 Te2 As4'
_cell_volume   167.6
_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  0.45  0.0  0.0  1.0
  Te  Te1  2  0.0  0.0  0.0  1.0
  As  As2  4  0.23  0.23  0.74  1.0

Hf Te As As
HfAs2Te crystallizes in the monoclinic Cm space group. Hf(1) is bonded in a 4-coordinate geometry to six equivalent As(1) atoms. There are a spread of Hf(1)-As(1) bond distances ranging from 2.40-3.40 Å. As(1) is bonded in a 5-coordinate geometry to three equivalent Hf(1) and two equivalent Te(1) atoms. There is one shorter (2.40 Å) and one longer (2.83 Å) As(1)-Te(1) bond length. Te(1) is bonded in a 4-coordinate geometry to four equivalent As(1) atoms.