The crystal structure described by HoCo4Ni crystallizes in the hexagonal P-6m2 space group. Ho(1) is bonded in a 18-coordinate geometry to three equivalent Co(1), twelve equivalent Co(2), and three equivalent Ni(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to three equivalent Ho(1), six equivalent Co(2), and three equivalent Ni(1) atoms to form distorted CoHo3Co6Ni3 cuboctahedra that share corners with nine equivalent Ni(1)Ho3Co9 cuboctahedra, corners with twelve equivalent Co(2)Ho4Co6Ni2 cuboctahedra, edges with six equivalent Co(1)Ho3Co6Ni3 cuboctahedra, faces with two equivalent Co(1)Ho3Co6Ni3 cuboctahedra, faces with three equivalent Ni(1)Ho3Co9 cuboctahedra, and faces with eighteen equivalent Co(2)Ho4Co6Ni2 cuboctahedra. In the second Co site, Co(2) is bonded to four equivalent Ho(1), two equivalent Co(1), four equivalent Co(2), and two equivalent Ni(1) atoms to form CoHo4Co6Ni2 cuboctahedra that share corners with four equivalent Co(1)Ho3Co6Ni3 cuboctahedra, corners with four equivalent Ni(1)Ho3Co9 cuboctahedra, corners with sixteen equivalent Co(2)Ho4Co6Ni2 cuboctahedra, edges with ten equivalent Co(2)Ho4Co6Ni2 cuboctahedra, faces with six equivalent Co(1)Ho3Co6Ni3 cuboctahedra, faces with six equivalent Ni(1)Ho3Co9 cuboctahedra, and faces with ten equivalent Co(2)Ho4Co6Ni2 cuboctahedra. Ni(1) is bonded to three equivalent Ho(1), three equivalent Co(1), and six equivalent Co(2) atoms to form distorted NiHo3Co9 cuboctahedra that share corners with nine equivalent Co(1)Ho3Co6Ni3 cuboctahedra, corners with twelve equivalent Co(2)Ho4Co6Ni2 cuboctahedra, edges with six equivalent Ni(1)Ho3Co9 cuboctahedra, faces with two equivalent Ni(1)Ho3Co9 cuboctahedra, faces with three equivalent Co(1)Ho3Co6Ni3 cuboctahedra, and faces with eighteen equivalent Co(2)Ho4Co6Ni2 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_HoCo4Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.906
_cell_length_b   4.906
_cell_length_c   3.940
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   82.136
_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
  Ho  Ho0  1  0.333  0.667  0.000  1.0
  Co  Co1  1  0.000  0.000  0.000  1.0
  Co  Co2  1  0.336  0.168  0.500  1.0
  Co  Co3  1  0.832  0.168  0.500  1.0
  Co  Co4  1  0.832  0.664  0.500  1.0
  Ni  Ni5  1  0.667  0.333  0.000  1.0
[/CIF]
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The crystal structure described by HoCo4Ni crystallizes in the hexagonal P-6m2 space group. Ho(1) is bonded in a 18-coordinate geometry to three equivalent Co(1), twelve equivalent Co(2), and three equivalent Ni(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to three equivalent Ho(1), six equivalent Co(2), and three equivalent Ni(1) atoms to form distorted CoHo3Co6Ni3 cuboctahedra that share corners with nine equivalent Ni(1)Ho3Co9 cuboctahedra, corners with twelve equivalent Co(2)Ho4Co6Ni2 cuboctahedra, edges with six equivalent Co(1)Ho3Co6Ni3 cuboctahedra, faces with two equivalent Co(1)Ho3Co6Ni3 cuboctahedra, faces with three equivalent Ni(1)Ho3Co9 cuboctahedra, and faces with eighteen equivalent Co(2)Ho4Co6Ni2 cuboctahedra. In the second Co site, Co(2) is bonded to four equivalent Ho(1), two equivalent Co(1), four equivalent Co(2), and two equivalent Ni(1) atoms to form CoHo4Co6Ni2 cuboctahedra that share corners with four equivalent Co(1)Ho3Co6Ni3 cuboctahedra, corners with four equivalent Ni(1)Ho3Co9 cuboctahedra, corners with sixteen equivalent Co(2)Ho4Co6Ni2 cuboctahedra, edges with ten equivalent Co(2)Ho4Co6Ni2 cuboctahedra, faces with six equivalent Co(1)Ho3Co6Ni3 cuboctahedra, faces with six equivalent Ni(1)Ho3Co9 cuboctahedra, and faces with ten equivalent Co(2)Ho4Co6Ni2 cuboctahedra. Ni(1) is bonded to three equivalent Ho(1), three equivalent Co(1), and six equivalent Co(2) atoms to form distorted NiHo3Co9 cuboctahedra that share corners with nine equivalent Co(1)Ho3Co6Ni3 cuboctahedra, corners with twelve equivalent Co(2)Ho4Co6Ni2 cuboctahedra, edges with six equivalent Ni(1)Ho3Co9 cuboctahedra, faces with two equivalent Ni(1)Ho3Co9 cuboctahedra, faces with three equivalent Co(1)Ho3Co6Ni3 cuboctahedra, and faces with eighteen equivalent Co(2)Ho4Co6Ni2 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_HoCo4Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.906
_cell_length_b   4.906
_cell_length_c   3.940
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   82.136
_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
  Ho  Ho0  1  0.333  0.667  0.000  1.0
  Co  Co1  1  0.000  0.000  0.000  1.0
  Co  Co2  1  0.336  0.168  0.500  1.0
  Co  Co3  1  0.832  0.168  0.500  1.0
  Co  Co4  1  0.832  0.664  0.500  1.0
  Ni  Ni5  1  0.667  0.333  0.000  1.0
[/CIF]
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