The crystal structure described by Ho2Al3Si2 crystallizes in the monoclinic C2/m space group. Ho(1) is bonded in a 11-coordinate geometry to two equivalent Al(2), four equivalent Al(1), and five equivalent Si(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted water-like geometry to four equivalent Ho(1) and two equivalent Si(1) atoms. In the second Al site, Al(2) is bonded in a 6-coordinate geometry to four equivalent Ho(1) and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to five equivalent Ho(1), one Al(2), two equivalent Al(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Ho2Al3Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.022
_cell_length_b   5.426
_cell_length_c   6.568
_cell_angle_alpha   100.164
_cell_angle_beta   90.000
_cell_angle_gamma   111.758
_symmetry_Int_Tables_number   1
_cell_volume   130.701
_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  0.380  0.761  0.678  1.0
  Ho  Ho1  1  0.620  0.239  0.322  1.0
  Al  Al2  1  0.695  0.390  0.868  1.0
  Al  Al3  1  0.000  0.000  0.000  1.0
  Al  Al4  1  0.305  0.610  0.132  1.0
  Si  Si5  1  0.907  0.815  0.359  1.0
  Si  Si6  1  0.093  0.185  0.641  1.0
[/CIF]
.
The crystal structure described by Ho2Al3Si2 crystallizes in the monoclinic C2/m space group. Ho(1) is bonded in a 11-coordinate geometry to two equivalent Al(2), four equivalent Al(1), and five equivalent Si(1) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted water-like geometry to four equivalent Ho(1) and two equivalent Si(1) atoms. In the second Al site, Al(2) is bonded in a 6-coordinate geometry to four equivalent Ho(1) and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to five equivalent Ho(1), one Al(2), two equivalent Al(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Ho2Al3Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.022
_cell_length_b   5.426
_cell_length_c   6.568
_cell_angle_alpha   100.164
_cell_angle_beta   90.000
_cell_angle_gamma   111.758
_symmetry_Int_Tables_number   1
_cell_volume   130.701
_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  0.380  0.761  0.678  1.0
  Ho  Ho1  1  0.620  0.239  0.322  1.0
  Al  Al2  1  0.695  0.390  0.868  1.0
  Al  Al3  1  0.000  0.000  0.000  1.0
  Al  Al4  1  0.305  0.610  0.132  1.0
  Si  Si5  1  0.907  0.815  0.359  1.0
  Si  Si6  1  0.093  0.185  0.641  1.0
[/CIF]
.