The crystal structure described by Ho5Ni2Sb crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to three equivalent Ni(1) and two equivalent Sb(1) atoms to form distorted HoNi3Sb2 trigonal bipyramids that share corners with four equivalent Ho(2)Ni4Sb2 octahedra, corners with twelve equivalent Ho(1)Ni3Sb2 trigonal bipyramids, edges with seven equivalent Ho(1)Ni3Sb2 trigonal bipyramids, faces with two equivalent Ho(2)Ni4Sb2 octahedra, and  a faceface with one Ho(1)Ni3Sb2 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 42-62°. In the second Ho site, Ho(2) is bonded to four equivalent Ni(1) and two equivalent Sb(1) atoms to form HoNi4Sb2 octahedra that share corners with six equivalent Ho(2)Ni4Sb2 octahedra, corners with sixteen equivalent Ho(1)Ni3Sb2 trigonal bipyramids, and faces with eight equivalent Ho(1)Ni3Sb2 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 0-51°. Ni(1) is bonded in a 8-coordinate geometry to two equivalent Ho(2) and six equivalent Ho(1) atoms. Sb(1) is bonded in a distorted q6 geometry to two equivalent Ho(2) and eight equivalent Ho(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho5Ni2Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.579
_cell_length_b   7.579
_cell_length_c   8.488
_cell_angle_alpha   116.504
_cell_angle_beta   116.504
_cell_angle_gamma   90.008
_symmetry_Int_Tables_number   1
_cell_volume   378.233
_cell_formula_units_Z   2
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  0.208  0.020  0.728  1.0
  Ho  Ho1  1  0.020  0.520  0.728  1.0
  Ho  Ho2  1  0.708  0.208  0.728  1.0
  Ho  Ho3  1  0.980  0.480  0.272  1.0
  Ho  Ho4  1  0.520  0.708  0.728  1.0
  Ho  Ho5  1  0.792  0.980  0.272  1.0
  Ho  Ho6  1  0.480  0.292  0.272  1.0
  Ho  Ho7  1  0.292  0.792  0.272  1.0
  Ho  Ho8  1  0.500  0.500  0.000  1.0
  Ho  Ho9  1  0.000  0.000  0.000  1.0
  Ni  Ni10  1  0.369  0.869  0.000  1.0
  Ni  Ni11  1  0.131  0.369  0.000  1.0
  Ni  Ni12  1  0.631  0.131  1.000  1.0
  Ni  Ni13  1  0.869  0.631  0.000  1.0
  Sb  Sb14  1  0.250  0.250  0.500  1.0
  Sb  Sb15  1  0.750  0.750  0.500  1.0
[/CIF]
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The crystal structure described by Ho5Ni2Sb crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to three equivalent Ni(1) and two equivalent Sb(1) atoms to form distorted HoNi3Sb2 trigonal bipyramids that share corners with four equivalent Ho(2)Ni4Sb2 octahedra, corners with twelve equivalent Ho(1)Ni3Sb2 trigonal bipyramids, edges with seven equivalent Ho(1)Ni3Sb2 trigonal bipyramids, faces with two equivalent Ho(2)Ni4Sb2 octahedra, and  a faceface with one Ho(1)Ni3Sb2 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 42-62°. In the second Ho site, Ho(2) is bonded to four equivalent Ni(1) and two equivalent Sb(1) atoms to form HoNi4Sb2 octahedra that share corners with six equivalent Ho(2)Ni4Sb2 octahedra, corners with sixteen equivalent Ho(1)Ni3Sb2 trigonal bipyramids, and faces with eight equivalent Ho(1)Ni3Sb2 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 0-51°. Ni(1) is bonded in a 8-coordinate geometry to two equivalent Ho(2) and six equivalent Ho(1) atoms. Sb(1) is bonded in a distorted q6 geometry to two equivalent Ho(2) and eight equivalent Ho(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho5Ni2Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.579
_cell_length_b   7.579
_cell_length_c   8.488
_cell_angle_alpha   116.504
_cell_angle_beta   116.504
_cell_angle_gamma   90.008
_symmetry_Int_Tables_number   1
_cell_volume   378.233
_cell_formula_units_Z   2
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  0.208  0.020  0.728  1.0
  Ho  Ho1  1  0.020  0.520  0.728  1.0
  Ho  Ho2  1  0.708  0.208  0.728  1.0
  Ho  Ho3  1  0.980  0.480  0.272  1.0
  Ho  Ho4  1  0.520  0.708  0.728  1.0
  Ho  Ho5  1  0.792  0.980  0.272  1.0
  Ho  Ho6  1  0.480  0.292  0.272  1.0
  Ho  Ho7  1  0.292  0.792  0.272  1.0
  Ho  Ho8  1  0.500  0.500  0.000  1.0
  Ho  Ho9  1  0.000  0.000  0.000  1.0
  Ni  Ni10  1  0.369  0.869  0.000  1.0
  Ni  Ni11  1  0.131  0.369  0.000  1.0
  Ni  Ni12  1  0.631  0.131  1.000  1.0
  Ni  Ni13  1  0.869  0.631  0.000  1.0
  Sb  Sb14  1  0.250  0.250  0.500  1.0
  Sb  Sb15  1  0.750  0.750  0.500  1.0
[/CIF]
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