The structure described by Hg2Cd2H(SO5)2 crystallizes in the monoclinic P2/c space group. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a linear geometry to two equivalent O(5) atoms. In the second Hg site, Hg(2) is bonded in a linear geometry to two equivalent O(5) atoms. Cd(1) is bonded to one H(1), one O(1), one O(2), one O(4), and two equivalent O(5) atoms to form distorted CdHO5 square pyramids that share  a cornercorner with one Cd(1)HO5 square pyramid, corners with three equivalent S(1)O4 tetrahedra, and  an edgeedge with one Cd(1)HO5 square pyramid. H(1) is bonded in a distorted water-like geometry to two equivalent Cd(1) atoms. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with three equivalent Cd(1)HO5 square pyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Cd(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one S(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one S(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Cd(1) and one S(1) atom. In the fifth O site, O(5) is bonded to one Hg(1), one Hg(2), and two equivalent Cd(1) atoms to form a mixture of corner and edge-sharing OCd2Hg2 tetrahedra. is represented by the CIF file [CIF]
data_Cd2Hg2H(SO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.346
_cell_length_b   7.874
_cell_length_c   11.707
_cell_angle_alpha   62.162
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   517.303
_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
  Cd  Cd0  1  0.499  0.746  0.080  1.0
  Cd  Cd1  1  0.501  0.254  0.920  1.0
  Cd  Cd2  1  0.499  0.254  0.420  1.0
  Cd  Cd3  1  0.501  0.746  0.580  1.0
  Hg  Hg4  1  0.282  0.000  0.250  1.0
  Hg  Hg5  1  0.718  0.000  0.750  1.0
  Hg  Hg6  1  0.000  0.000  0.000  1.0
  Hg  Hg7  1  0.000  0.000  0.500  1.0
  H  H8  1  0.275  0.500  0.250  1.0
  H  H9  1  0.725  0.500  0.750  1.0
  S  S10  1  0.780  0.668  0.355  1.0
  S  S11  1  0.220  0.332  0.645  1.0
  S  S12  1  0.780  0.332  0.145  1.0
  S  S13  1  0.220  0.668  0.855  1.0
  O  O14  1  0.764  0.736  0.455  1.0
  O  O15  1  0.236  0.264  0.545  1.0
  O  O16  1  0.764  0.264  0.045  1.0
  O  O17  1  0.236  0.736  0.955  1.0
  O  O18  1  0.749  0.544  0.082  1.0
  O  O19  1  0.251  0.456  0.918  1.0
  O  O20  1  0.749  0.456  0.418  1.0
  O  O21  1  0.251  0.544  0.582  1.0
  O  O22  1  0.987  0.723  0.291  1.0
  O  O23  1  0.013  0.277  0.709  1.0
  O  O24  1  0.987  0.277  0.209  1.0
  O  O25  1  0.013  0.723  0.791  1.0
  O  O26  1  0.604  0.765  0.259  1.0
  O  O27  1  0.396  0.235  0.741  1.0
  O  O28  1  0.604  0.235  0.241  1.0
  O  O29  1  0.396  0.765  0.759  1.0
  O  O30  1  0.298  0.995  0.431  1.0
  O  O31  1  0.702  0.005  0.569  1.0
  O  O32  1  0.298  0.005  0.069  1.0
  O  O33  1  0.702  0.995  0.931  1.0
[/CIF]
.
The structure described by Hg2Cd2H(SO5)2 crystallizes in the monoclinic P2/c space group. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a linear geometry to two equivalent O(5) atoms. In the second Hg site, Hg(2) is bonded in a linear geometry to two equivalent O(5) atoms. Cd(1) is bonded to one H(1), one O(1), one O(2), one O(4), and two equivalent O(5) atoms to form distorted CdHO5 square pyramids that share  a cornercorner with one Cd(1)HO5 square pyramid, corners with three equivalent S(1)O4 tetrahedra, and  an edgeedge with one Cd(1)HO5 square pyramid. H(1) is bonded in a distorted water-like geometry to two equivalent Cd(1) atoms. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with three equivalent Cd(1)HO5 square pyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Cd(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one S(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one S(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Cd(1) and one S(1) atom. In the fifth O site, O(5) is bonded to one Hg(1), one Hg(2), and two equivalent Cd(1) atoms to form a mixture of corner and edge-sharing OCd2Hg2 tetrahedra. is represented by the CIF file [CIF]
data_Cd2Hg2H(SO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.346
_cell_length_b   7.874
_cell_length_c   11.707
_cell_angle_alpha   62.162
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   517.303
_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
  Cd  Cd0  1  0.499  0.746  0.080  1.0
  Cd  Cd1  1  0.501  0.254  0.920  1.0
  Cd  Cd2  1  0.499  0.254  0.420  1.0
  Cd  Cd3  1  0.501  0.746  0.580  1.0
  Hg  Hg4  1  0.282  0.000  0.250  1.0
  Hg  Hg5  1  0.718  0.000  0.750  1.0
  Hg  Hg6  1  0.000  0.000  0.000  1.0
  Hg  Hg7  1  0.000  0.000  0.500  1.0
  H  H8  1  0.275  0.500  0.250  1.0
  H  H9  1  0.725  0.500  0.750  1.0
  S  S10  1  0.780  0.668  0.355  1.0
  S  S11  1  0.220  0.332  0.645  1.0
  S  S12  1  0.780  0.332  0.145  1.0
  S  S13  1  0.220  0.668  0.855  1.0
  O  O14  1  0.764  0.736  0.455  1.0
  O  O15  1  0.236  0.264  0.545  1.0
  O  O16  1  0.764  0.264  0.045  1.0
  O  O17  1  0.236  0.736  0.955  1.0
  O  O18  1  0.749  0.544  0.082  1.0
  O  O19  1  0.251  0.456  0.918  1.0
  O  O20  1  0.749  0.456  0.418  1.0
  O  O21  1  0.251  0.544  0.582  1.0
  O  O22  1  0.987  0.723  0.291  1.0
  O  O23  1  0.013  0.277  0.709  1.0
  O  O24  1  0.987  0.277  0.209  1.0
  O  O25  1  0.013  0.723  0.791  1.0
  O  O26  1  0.604  0.765  0.259  1.0
  O  O27  1  0.396  0.235  0.741  1.0
  O  O28  1  0.604  0.235  0.241  1.0
  O  O29  1  0.396  0.765  0.759  1.0
  O  O30  1  0.298  0.995  0.431  1.0
  O  O31  1  0.702  0.005  0.569  1.0
  O  O32  1  0.298  0.005  0.069  1.0
  O  O33  1  0.702  0.995  0.931  1.0
[/CIF]
.