The material structure described by CsH2AsO4 crystallizes in the orthorhombic Fdd2 space group. Cs(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. As(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to two equivalent Cs(1), one As(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1), one As(1), and one H(1) atom. is represented by the CIF card [CIF]
data_CsAs(HO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.123
_cell_length_b   7.090
_cell_length_c   6.905
_cell_angle_alpha   70.940
_cell_angle_beta   55.593
_cell_angle_gamma   53.467
_symmetry_Int_Tables_number   1
_cell_volume   263.613
_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
  Cs  Cs0  1  0.509  0.991  0.991  1.0
  Cs  Cs1  1  0.259  0.741  0.741  1.0
  As  As2  1  0.993  0.507  0.507  1.0
  As  As3  1  0.743  0.257  0.257  1.0
  H  H4  1  0.351  0.232  0.512  1.0
  H  H5  1  0.018  0.899  0.346  1.0
  H  H6  1  0.738  0.346  0.899  1.0
  H  H7  1  0.904  0.512  0.232  1.0
  O  O8  1  0.035  0.519  0.223  1.0
  O  O9  1  0.027  0.713  0.527  1.0
  O  O10  1  0.537  0.223  0.518  1.0
  O  O11  1  0.731  0.215  0.027  1.0
  O  O12  1  0.027  0.027  0.215  1.0
  O  O13  1  0.723  0.518  0.223  1.0
  O  O14  1  0.732  0.527  0.713  1.0
  O  O15  1  0.223  0.223  0.519  1.0
[/CIF]
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The material structure described by CsH2AsO4 crystallizes in the orthorhombic Fdd2 space group. Cs(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. As(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to two equivalent Cs(1), one As(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Cs(1), one As(1), and one H(1) atom. is represented by the CIF card [CIF]
data_CsAs(HO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.123
_cell_length_b   7.090
_cell_length_c   6.905
_cell_angle_alpha   70.940
_cell_angle_beta   55.593
_cell_angle_gamma   53.467
_symmetry_Int_Tables_number   1
_cell_volume   263.613
_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
  Cs  Cs0  1  0.509  0.991  0.991  1.0
  Cs  Cs1  1  0.259  0.741  0.741  1.0
  As  As2  1  0.993  0.507  0.507  1.0
  As  As3  1  0.743  0.257  0.257  1.0
  H  H4  1  0.351  0.232  0.512  1.0
  H  H5  1  0.018  0.899  0.346  1.0
  H  H6  1  0.738  0.346  0.899  1.0
  H  H7  1  0.904  0.512  0.232  1.0
  O  O8  1  0.035  0.519  0.223  1.0
  O  O9  1  0.027  0.713  0.527  1.0
  O  O10  1  0.537  0.223  0.518  1.0
  O  O11  1  0.731  0.215  0.027  1.0
  O  O12  1  0.027  0.027  0.215  1.0
  O  O13  1  0.723  0.518  0.223  1.0
  O  O14  1  0.732  0.527  0.713  1.0
  O  O15  1  0.223  0.223  0.519  1.0
[/CIF]
.