The structure described by Cu2Cd(SO4)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one S(1), one O(2), one O(3), and one O(4) atom to form distorted CuSO3 trigonal pyramids that share corners with three equivalent S(1)CuO3 tetrahedra and  an edgeedge with one Cd(1)O6 octahedra. Cd(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted CdO6 octahedra that share corners with four equivalent S(1)CuO3 tetrahedra and edges with two equivalent Cu(1)SO3 trigonal pyramids. S(1) is bonded to one Cu(1), one O(2), one O(3), and one O(4) atom to form distorted SCuO3 tetrahedra that share corners with two equivalent Cd(1)O6 octahedra and corners with three equivalent Cu(1)SO3 trigonal pyramids. The corner-sharing octahedral tilt angles range from 53-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Cd(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cu(1) and one S(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cu(1), one Cd(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Cu(1), one Cd(1), and one S(1) atom. is represented by the CIF file [CIF]
data_CdCu2(SO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.440
_cell_length_b   5.892
_cell_length_c   9.765
_cell_angle_alpha   53.958
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   392.638
_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  0.000  0.000  0.000  1.0
  Cd  Cd1  1  0.500  0.000  0.500  1.0
  Cu  Cu2  1  0.133  0.709  0.542  1.0
  Cu  Cu3  1  0.867  0.291  0.458  1.0
  Cu  Cu4  1  0.633  0.291  0.958  1.0
  Cu  Cu5  1  0.367  0.709  0.042  1.0
  S  S6  1  0.879  0.635  0.616  1.0
  S  S7  1  0.121  0.365  0.384  1.0
  S  S8  1  0.379  0.365  0.884  1.0
  S  S9  1  0.621  0.635  0.116  1.0
  O  O10  1  0.512  0.056  0.694  1.0
  O  O11  1  0.488  0.944  0.306  1.0
  O  O12  1  0.012  0.944  0.806  1.0
  O  O13  1  0.988  0.056  0.194  1.0
  O  O14  1  0.301  0.487  0.966  1.0
  O  O15  1  0.699  0.513  0.034  1.0
  O  O16  1  0.801  0.513  0.534  1.0
  O  O17  1  0.199  0.487  0.466  1.0
  O  O18  1  0.347  0.558  0.696  1.0
  O  O19  1  0.653  0.442  0.304  1.0
  O  O20  1  0.847  0.442  0.804  1.0
  O  O21  1  0.153  0.558  0.196  1.0
  O  O22  1  0.294  0.089  0.953  1.0
  O  O23  1  0.706  0.911  0.047  1.0
  O  O24  1  0.794  0.911  0.547  1.0
  O  O25  1  0.206  0.089  0.453  1.0
[/CIF]
.
The structure described by Cu2Cd(SO4)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one S(1), one O(2), one O(3), and one O(4) atom to form distorted CuSO3 trigonal pyramids that share corners with three equivalent S(1)CuO3 tetrahedra and  an edgeedge with one Cd(1)O6 octahedra. Cd(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form distorted CdO6 octahedra that share corners with four equivalent S(1)CuO3 tetrahedra and edges with two equivalent Cu(1)SO3 trigonal pyramids. S(1) is bonded to one Cu(1), one O(2), one O(3), and one O(4) atom to form distorted SCuO3 tetrahedra that share corners with two equivalent Cd(1)O6 octahedra and corners with three equivalent Cu(1)SO3 trigonal pyramids. The corner-sharing octahedral tilt angles range from 53-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Cd(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Cu(1) and one S(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Cu(1), one Cd(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Cu(1), one Cd(1), and one S(1) atom. is represented by the CIF file [CIF]
data_CdCu2(SO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.440
_cell_length_b   5.892
_cell_length_c   9.765
_cell_angle_alpha   53.958
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   392.638
_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  0.000  0.000  0.000  1.0
  Cd  Cd1  1  0.500  0.000  0.500  1.0
  Cu  Cu2  1  0.133  0.709  0.542  1.0
  Cu  Cu3  1  0.867  0.291  0.458  1.0
  Cu  Cu4  1  0.633  0.291  0.958  1.0
  Cu  Cu5  1  0.367  0.709  0.042  1.0
  S  S6  1  0.879  0.635  0.616  1.0
  S  S7  1  0.121  0.365  0.384  1.0
  S  S8  1  0.379  0.365  0.884  1.0
  S  S9  1  0.621  0.635  0.116  1.0
  O  O10  1  0.512  0.056  0.694  1.0
  O  O11  1  0.488  0.944  0.306  1.0
  O  O12  1  0.012  0.944  0.806  1.0
  O  O13  1  0.988  0.056  0.194  1.0
  O  O14  1  0.301  0.487  0.966  1.0
  O  O15  1  0.699  0.513  0.034  1.0
  O  O16  1  0.801  0.513  0.534  1.0
  O  O17  1  0.199  0.487  0.466  1.0
  O  O18  1  0.347  0.558  0.696  1.0
  O  O19  1  0.653  0.442  0.304  1.0
  O  O20  1  0.847  0.442  0.804  1.0
  O  O21  1  0.153  0.558  0.196  1.0
  O  O22  1  0.294  0.089  0.953  1.0
  O  O23  1  0.706  0.911  0.047  1.0
  O  O24  1  0.794  0.911  0.547  1.0
  O  O25  1  0.206  0.089  0.453  1.0
[/CIF]
.