The crystal structure described by Al2Ho3 crystallizes in the tetragonal P4_2/mnm space group. There are three inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a distorted square co-planar geometry to four equivalent Al(1) atoms. In the second Ho site, Ho(3) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. In the third Ho site, Ho(2) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to two equivalent Ho(1), three equivalent Ho(2), three equivalent Ho(3), and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho3Al2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.153
_cell_length_b   8.153
_cell_length_c   7.590
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   504.597
_cell_formula_units_Z   4
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  0.000  0.500  0.250  1.0
  Ho  Ho1  1  0.500  0.000  0.750  1.0
  Ho  Ho2  1  0.500  0.000  0.250  1.0
  Ho  Ho3  1  0.000  0.500  0.750  1.0
  Ho  Ho4  1  0.151  0.849  0.500  1.0
  Ho  Ho5  1  0.849  0.151  0.500  1.0
  Ho  Ho6  1  0.349  0.349  0.000  1.0
  Ho  Ho7  1  0.651  0.651  0.000  1.0
  Ho  Ho8  1  0.202  0.798  0.000  1.0
  Ho  Ho9  1  0.798  0.202  0.000  1.0
  Ho  Ho10  1  0.298  0.298  0.500  1.0
  Ho  Ho11  1  0.702  0.702  0.500  1.0
  Al  Al12  1  0.381  0.619  0.304  1.0
  Al  Al13  1  0.619  0.381  0.304  1.0
  Al  Al14  1  0.119  0.119  0.804  1.0
  Al  Al15  1  0.881  0.881  0.804  1.0
  Al  Al16  1  0.381  0.619  0.696  1.0
  Al  Al17  1  0.619  0.381  0.696  1.0
  Al  Al18  1  0.119  0.119  0.196  1.0
  Al  Al19  1  0.881  0.881  0.196  1.0
[/CIF]
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The crystal structure described by Al2Ho3 crystallizes in the tetragonal P4_2/mnm space group. There are three inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a distorted square co-planar geometry to four equivalent Al(1) atoms. In the second Ho site, Ho(3) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. In the third Ho site, Ho(2) is bonded in a 6-coordinate geometry to six equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to two equivalent Ho(1), three equivalent Ho(2), three equivalent Ho(3), and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho3Al2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.153
_cell_length_b   8.153
_cell_length_c   7.590
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   504.597
_cell_formula_units_Z   4
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  0.000  0.500  0.250  1.0
  Ho  Ho1  1  0.500  0.000  0.750  1.0
  Ho  Ho2  1  0.500  0.000  0.250  1.0
  Ho  Ho3  1  0.000  0.500  0.750  1.0
  Ho  Ho4  1  0.151  0.849  0.500  1.0
  Ho  Ho5  1  0.849  0.151  0.500  1.0
  Ho  Ho6  1  0.349  0.349  0.000  1.0
  Ho  Ho7  1  0.651  0.651  0.000  1.0
  Ho  Ho8  1  0.202  0.798  0.000  1.0
  Ho  Ho9  1  0.798  0.202  0.000  1.0
  Ho  Ho10  1  0.298  0.298  0.500  1.0
  Ho  Ho11  1  0.702  0.702  0.500  1.0
  Al  Al12  1  0.381  0.619  0.304  1.0
  Al  Al13  1  0.619  0.381  0.304  1.0
  Al  Al14  1  0.119  0.119  0.804  1.0
  Al  Al15  1  0.881  0.881  0.804  1.0
  Al  Al16  1  0.381  0.619  0.696  1.0
  Al  Al17  1  0.619  0.381  0.696  1.0
  Al  Al18  1  0.119  0.119  0.196  1.0
  Al  Al19  1  0.881  0.881  0.196  1.0
[/CIF]
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