The material described by Ho2Ni2Al crystallizes in the orthorhombic Immm space group. Ho(1) is bonded in a 6-coordinate geometry to six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to six equivalent Ho(1), one Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded to four equivalent Ni(1) atoms to form distorted edge-sharing AlNi4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho2AlNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.317
_cell_length_b   5.317
_cell_length_c   5.317
_cell_angle_alpha   134.046
_cell_angle_beta   119.709
_cell_angle_gamma   78.999
_symmetry_Int_Tables_number   1
_cell_volume   90.944
_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  0.703  0.203  0.500  1.0
  Ho  Ho1  1  0.297  0.797  0.500  1.0
  Al  Al2  1  0.000  0.000  0.000  1.0
  Ni  Ni3  1  0.267  0.500  0.767  1.0
  Ni  Ni4  1  0.733  0.500  0.233  1.0
[/CIF]
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The material described by Ho2Ni2Al crystallizes in the orthorhombic Immm space group. Ho(1) is bonded in a 6-coordinate geometry to six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to six equivalent Ho(1), one Ni(1), and two equivalent Al(1) atoms. Al(1) is bonded to four equivalent Ni(1) atoms to form distorted edge-sharing AlNi4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho2AlNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.317
_cell_length_b   5.317
_cell_length_c   5.317
_cell_angle_alpha   134.046
_cell_angle_beta   119.709
_cell_angle_gamma   78.999
_symmetry_Int_Tables_number   1
_cell_volume   90.944
_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  0.703  0.203  0.500  1.0
  Ho  Ho1  1  0.297  0.797  0.500  1.0
  Al  Al2  1  0.000  0.000  0.000  1.0
  Ni  Ni3  1  0.267  0.500  0.767  1.0
  Ni  Ni4  1  0.733  0.500  0.233  1.0
[/CIF]
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