The material described by AlH5(SeO4)2 crystallizes in the monoclinic P2_1/c space group. Al(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a linear geometry to two equivalent O(3) atoms. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) atom. Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Al(1), one H(1), and one H(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Al(1) and one Se(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one H(2) and one Se(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Al(1) and one Se(1) atom. is represented by the CIF file [CIF]
data_AlH5(SeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.585
_cell_length_b   7.488
_cell_length_c   8.935
_cell_angle_alpha   54.020
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   356.521
_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
  Al  Al0  1  0.000  0.000  0.000  1.0
  Al  Al1  1  0.500  0.000  0.500  1.0
  H  H2  1  0.255  0.686  0.091  1.0
  H  H3  1  0.745  0.314  0.909  1.0
  H  H4  1  0.755  0.314  0.409  1.0
  H  H5  1  0.245  0.686  0.591  1.0
  H  H6  1  0.000  0.500  0.500  1.0
  H  H7  1  0.500  0.500  0.000  1.0
  H  H8  1  0.719  0.307  0.235  1.0
  H  H9  1  0.281  0.693  0.765  1.0
  H  H10  1  0.219  0.693  0.265  1.0
  H  H11  1  0.781  0.307  0.735  1.0
  Se  Se12  1  0.698  0.745  0.346  1.0
  Se  Se13  1  0.302  0.255  0.654  1.0
  Se  Se14  1  0.198  0.255  0.154  1.0
  Se  Se15  1  0.802  0.745  0.846  1.0
  O  O16  1  0.223  0.785  0.127  1.0
  O  O17  1  0.777  0.215  0.873  1.0
  O  O18  1  0.723  0.215  0.373  1.0
  O  O19  1  0.277  0.785  0.627  1.0
  O  O20  1  0.836  0.779  0.018  1.0
  O  O21  1  0.164  0.221  0.982  1.0
  O  O22  1  0.336  0.221  0.482  1.0
  O  O23  1  0.664  0.779  0.518  1.0
  O  O24  1  0.818  0.483  0.481  1.0
  O  O25  1  0.182  0.517  0.519  1.0
  O  O26  1  0.318  0.517  0.019  1.0
  O  O27  1  0.682  0.483  0.981  1.0
  O  O28  1  0.903  0.917  0.231  1.0
  O  O29  1  0.097  0.083  0.769  1.0
  O  O30  1  0.403  0.083  0.269  1.0
  O  O31  1  0.597  0.917  0.731  1.0
[/CIF]
.
The material described by AlH5(SeO4)2 crystallizes in the monoclinic P2_1/c space group. Al(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a linear geometry to two equivalent O(3) atoms. In the third H site, H(3) is bonded in a single-bond geometry to one O(1) atom. Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Al(1), one H(1), and one H(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Al(1) and one Se(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one H(2) and one Se(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Al(1) and one Se(1) atom. is represented by the CIF file [CIF]
data_AlH5(SeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.585
_cell_length_b   7.488
_cell_length_c   8.935
_cell_angle_alpha   54.020
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   356.521
_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
  Al  Al0  1  0.000  0.000  0.000  1.0
  Al  Al1  1  0.500  0.000  0.500  1.0
  H  H2  1  0.255  0.686  0.091  1.0
  H  H3  1  0.745  0.314  0.909  1.0
  H  H4  1  0.755  0.314  0.409  1.0
  H  H5  1  0.245  0.686  0.591  1.0
  H  H6  1  0.000  0.500  0.500  1.0
  H  H7  1  0.500  0.500  0.000  1.0
  H  H8  1  0.719  0.307  0.235  1.0
  H  H9  1  0.281  0.693  0.765  1.0
  H  H10  1  0.219  0.693  0.265  1.0
  H  H11  1  0.781  0.307  0.735  1.0
  Se  Se12  1  0.698  0.745  0.346  1.0
  Se  Se13  1  0.302  0.255  0.654  1.0
  Se  Se14  1  0.198  0.255  0.154  1.0
  Se  Se15  1  0.802  0.745  0.846  1.0
  O  O16  1  0.223  0.785  0.127  1.0
  O  O17  1  0.777  0.215  0.873  1.0
  O  O18  1  0.723  0.215  0.373  1.0
  O  O19  1  0.277  0.785  0.627  1.0
  O  O20  1  0.836  0.779  0.018  1.0
  O  O21  1  0.164  0.221  0.982  1.0
  O  O22  1  0.336  0.221  0.482  1.0
  O  O23  1  0.664  0.779  0.518  1.0
  O  O24  1  0.818  0.483  0.481  1.0
  O  O25  1  0.182  0.517  0.519  1.0
  O  O26  1  0.318  0.517  0.019  1.0
  O  O27  1  0.682  0.483  0.981  1.0
  O  O28  1  0.903  0.917  0.231  1.0
  O  O29  1  0.097  0.083  0.769  1.0
  O  O30  1  0.403  0.083  0.269  1.0
  O  O31  1  0.597  0.917  0.731  1.0
[/CIF]
.