data_HfCuP4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.01
_cell_length_b   5.01
_cell_length_c   5.01
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfCuP4
_chemical_formula_sum   'Hf1 Cu1 P4'
_cell_volume   89.12
_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  0.77  1.0
  Cu  Cu0  1  0.0  0.0  0.0  1.0
  P  P2  1  0.65  0.65  0.44  1.0
  P  P3  1  0.65  0.44  0.65  1.0
  P  P4  1  0.44  0.65  0.65  1.0
  P  P5  1  0.44  0.44  0.44  1.0

data_HfCuP4
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.01
_cell_length_b   5.01
_cell_length_c   12.28
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   HfCuP4
_chemical_formula_sum   'Hf3 Cu3 P12'
_cell_volume   267.36
_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  0.23  1.0
  Cu  Cu1  3  0.0  0.0  -0.0  1.0
  P  P2  9  0.14  0.07  0.42  1.0
  P  P3  3  0.0  0.0  0.56  1.0

Hf Cu P P P P
HfCuP4 crystallizes in the trigonal R3m space group. Hf(1) is bonded in a 13-coordinate geometry to four equivalent Cu(1), three equivalent P(2), and six equivalent P(1) atoms. There is one shorter (2.79 Å) and three longer (3.17 Å) Hf(1)-Cu(1) bond lengths. All Hf(1)-P(2) bond lengths are 2.89 Å. There are three shorter (2.44 Å) and three longer (2.87 Å) Hf(1)-P(1) bond lengths. Cu(1) is bonded in a 4-coordinate geometry to four equivalent Hf(1) and three equivalent P(1) atoms. All Cu(1)-P(1) bond lengths are 2.52 Å. There are two inequivalent P sites. In the first P site, P(2) is bonded in a 6-coordinate geometry to three equivalent Hf(1) and three equivalent P(1) atoms. All P(2)-P(1) bond lengths are 1.83 Å. In the second P site, P(1) is bonded in a 6-coordinate geometry to two equivalent Hf(1), one Cu(1), one P(2), and two equivalent P(1) atoms. Both P(1)-P(1) bond lengths are 1.05 Å.