data_KHfCo2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.54
_cell_length_b   4.54
_cell_length_c   4.54
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KHfCo2
_chemical_formula_sum   'K1 Hf1 Co2'
_cell_volume   66.35
_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
  K  K3  1  0.0  0.0  0.0  1.0
  Hf  Hf2  1  0.82  0.82  0.82  1.0
  Co  Co0  1  0.61  0.61  0.61  1.0
  Co  Co1  1  0.21  0.21  0.21  1.0

data_KHfCo2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.54
_cell_length_b   4.54
_cell_length_c   11.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   KHfCo2
_chemical_formula_sum   'K3 Hf3 Co6'
_cell_volume   199.05
_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
  K  K0  3  0.0  0.0  0.0  1.0
  Hf  Hf1  3  0.0  0.0  0.18  1.0
  Co  Co2  3  0.0  0.0  0.39  1.0
  Co  Co3  3  0.0  0.0  0.79  1.0

K Hf Co Co
K Hf Co Co 0 1 - - - 0 3 o o o 0 3 o o - 0 3 - o o 0 3 o - o 0 2 o - - 0 2 - o - 0 2 - - o 1 2 o o o 1 2 o + o 1 2 + o o 1 2 o o + 1 3 + + o 1 3 + o + 1 3 o + + 2 3 o o + 2 3 o + o 2 3 + o o 
KHfCo2 crystallizes in the trigonal R3m space group. K(1) is bonded in a 2-coordinate geometry to one Hf(1), one Co(2), and three equivalent Co(1) atoms. The K(1)-Hf(1) bond length is 2.01 Å. The K(1)-Co(2) bond length is 2.37 Å. All K(1)-Co(1) bond lengths are 2.71 Å. Hf(1) is bonded in a 2-coordinate geometry to one K(1) and one Co(1) atom. The Hf(1)-Co(1) bond length is 2.37 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one Hf(1) atom. In the second Co site, Co(2) is bonded in a 1-coordinate geometry to one K(1) atom.