data_Hf2NiSb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.76
_cell_length_b   4.76
_cell_length_c   4.76
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Hf2NiSb
_chemical_formula_sum   'Hf2 Ni1 Sb1'
_cell_volume   76.37
_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  Hf0  1  0.05  0.05  0.05  1.0
  Hf  Hf1  1  0.68  0.68  0.68  1.0
  Ni  Ni2  1  0.0  0.0  0.0  1.0
  Sb  Sb3  1  0.37  0.37  0.37  1.0

data_Hf2NiSb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.76
_cell_length_b   4.76
_cell_length_c   11.67
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Hf2NiSb
_chemical_formula_sum   'Hf6 Ni3 Sb3'
_cell_volume   229.11
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.32  1.0
  Hf  Hf1  3  0.0  0.0  0.95  1.0
  Ni  Ni2  3  0.0  0.0  0.0  1.0
  Sb  Sb3  3  0.0  0.0  0.63  1.0

Hf Hf Ni Sb
Hf Hf Ni Sb 0 2 o o o 0 1 o - - 0 1 - o - 0 1 - - o 0 3 o o - 0 3 o - o 0 3 - o o 1 3 o o + 1 3 o + o 1 3 + o o 1 2 o + + 1 2 + o + 1 2 + + o 2 3 o o - 2 3 o - o 2 3 - o o 
Hf2NiSb crystallizes in the trigonal R3m space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a single-bond geometry to three equivalent Hf(2), one Ni(1), and four equivalent Sb(1) atoms. All Hf(1)-Hf(2) bond lengths are 2.78 Å. The Hf(1)-Ni(1) bond length is 0.60 Å. There are three shorter (2.76 Å) and one longer (3.69 Å) Hf(1)-Sb(1) bond length. In the second Hf site, Hf(2) is bonded in a 11-coordinate geometry to three equivalent Hf(1), four equivalent Ni(1), and four equivalent Sb(1) atoms. There are three shorter (2.76 Å) and one longer (3.69 Å) Hf(2)-Ni(1) bond length. There are three shorter (2.76 Å) and one longer (3.69 Å) Hf(2)-Sb(1) bond length. Ni(1) is bonded in a single-bond geometry to one Hf(1), four equivalent Hf(2), and three equivalent Sb(1) atoms. All Ni(1)-Sb(1) bond lengths are 2.78 Å. Sb(1) is bonded in a 11-coordinate geometry to four equivalent Hf(1), four equivalent Hf(2), and three equivalent Ni(1) atoms.