The structure described by CsHSeO4 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. Se(1) is bonded in a tetrahedral geometry to one O(1), 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 water-like geometry to one Cs(1), one H(1), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1), one H(1), and one Se(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to three equivalent Cs(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to three equivalent Cs(1) and one Se(1) atom. is represented by the CIF card [CIF]
data_CsHSeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.686
_cell_length_b   7.964
_cell_length_c   8.156
_cell_angle_alpha   69.516
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   528.551
_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
  Cs  Cs0  1  0.625  0.294  0.706  1.0
  Cs  Cs1  1  0.125  0.206  0.294  1.0
  Cs  Cs2  1  0.375  0.706  0.294  1.0
  Cs  Cs3  1  0.875  0.794  0.706  1.0
  H  H4  1  0.292  0.038  0.890  1.0
  H  H5  1  0.792  0.462  0.110  1.0
  H  H6  1  0.708  0.962  0.110  1.0
  H  H7  1  0.208  0.538  0.890  1.0
  Se  Se8  1  0.128  0.279  0.756  1.0
  Se  Se9  1  0.628  0.221  0.244  1.0
  Se  Se10  1  0.872  0.721  0.244  1.0
  Se  Se11  1  0.372  0.779  0.756  1.0
  O  O12  1  0.212  0.107  0.935  1.0
  O  O13  1  0.712  0.393  0.065  1.0
  O  O14  1  0.788  0.893  0.065  1.0
  O  O15  1  0.288  0.607  0.935  1.0
  O  O16  1  0.428  0.924  0.852  1.0
  O  O17  1  0.928  0.576  0.148  1.0
  O  O18  1  0.572  0.076  0.148  1.0
  O  O19  1  0.072  0.424  0.852  1.0
  O  O20  1  0.521  0.695  0.684  1.0
  O  O21  1  0.021  0.805  0.316  1.0
  O  O22  1  0.479  0.305  0.316  1.0
  O  O23  1  0.979  0.195  0.684  1.0
  O  O24  1  0.236  0.858  0.607  1.0
  O  O25  1  0.736  0.642  0.393  1.0
  O  O26  1  0.764  0.142  0.393  1.0
  O  O27  1  0.264  0.358  0.607  1.0
[/CIF]
.
The structure described by CsHSeO4 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. Se(1) is bonded in a tetrahedral geometry to one O(1), 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 water-like geometry to one Cs(1), one H(1), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1), one H(1), and one Se(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to three equivalent Cs(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to three equivalent Cs(1) and one Se(1) atom. is represented by the CIF card [CIF]
data_CsHSeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.686
_cell_length_b   7.964
_cell_length_c   8.156
_cell_angle_alpha   69.516
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   528.551
_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
  Cs  Cs0  1  0.625  0.294  0.706  1.0
  Cs  Cs1  1  0.125  0.206  0.294  1.0
  Cs  Cs2  1  0.375  0.706  0.294  1.0
  Cs  Cs3  1  0.875  0.794  0.706  1.0
  H  H4  1  0.292  0.038  0.890  1.0
  H  H5  1  0.792  0.462  0.110  1.0
  H  H6  1  0.708  0.962  0.110  1.0
  H  H7  1  0.208  0.538  0.890  1.0
  Se  Se8  1  0.128  0.279  0.756  1.0
  Se  Se9  1  0.628  0.221  0.244  1.0
  Se  Se10  1  0.872  0.721  0.244  1.0
  Se  Se11  1  0.372  0.779  0.756  1.0
  O  O12  1  0.212  0.107  0.935  1.0
  O  O13  1  0.712  0.393  0.065  1.0
  O  O14  1  0.788  0.893  0.065  1.0
  O  O15  1  0.288  0.607  0.935  1.0
  O  O16  1  0.428  0.924  0.852  1.0
  O  O17  1  0.928  0.576  0.148  1.0
  O  O18  1  0.572  0.076  0.148  1.0
  O  O19  1  0.072  0.424  0.852  1.0
  O  O20  1  0.521  0.695  0.684  1.0
  O  O21  1  0.021  0.805  0.316  1.0
  O  O22  1  0.479  0.305  0.316  1.0
  O  O23  1  0.979  0.195  0.684  1.0
  O  O24  1  0.236  0.858  0.607  1.0
  O  O25  1  0.736  0.642  0.393  1.0
  O  O26  1  0.764  0.142  0.393  1.0
  O  O27  1  0.264  0.358  0.607  1.0
[/CIF]
.