The crystal structure described by Rb2Co(SO7)2 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded to one O(1), one O(3), one O(4), one O(5), two equivalent O(2), and two equivalent O(7) atoms to form distorted RbO8 hexagonal bipyramids that share corners with two equivalent Rb(1)O8 hexagonal bipyramids, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent S(1)O4 tetrahedra,  an edgeedge with one Rb(1)O8 hexagonal bipyramid, and edges with two equivalent S(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-40°. Co(1) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form distorted CoO6 octahedra that share corners with four equivalent Rb(1)O8 hexagonal bipyramids. S(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form SO4 tetrahedra that share corners with two equivalent Rb(1)O8 hexagonal bipyramids and edges with two equivalent Rb(1)O8 hexagonal bipyramids. There are seven inequivalent O sites. In the first O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one S(1) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Rb(1) and one S(1) atom. In the third O site, O(2) is bonded in a single-bond geometry to two equivalent Rb(1) and one S(1) atom. In the fourth O site, O(3) is bonded in a single-bond geometry to one Rb(1) and one Co(1) atom. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1) and one S(1) atom. In the sixth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1) and one Co(1) atom. In the seventh O site, O(6) is bonded in a single-bond geometry to one Co(1) atom. is represented by the CIF card [CIF]
data_Rb2Co(SO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.407
_cell_length_b   6.380
_cell_length_c   8.908
_cell_angle_alpha   76.821
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   686.551
_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
  Rb  Rb0  1  0.657  0.844  0.864  1.0
  Rb  Rb1  1  0.343  0.156  0.136  1.0
  Rb  Rb2  1  0.157  0.156  0.636  1.0
  Rb  Rb3  1  0.843  0.844  0.364  1.0
  Co  Co4  1  0.500  0.500  0.500  1.0
  Co  Co5  1  0.000  0.500  0.000  1.0
  S  S6  1  0.357  0.751  0.903  1.0
  S  S7  1  0.643  0.249  0.097  1.0
  S  S8  1  0.857  0.249  0.597  1.0
  S  S9  1  0.143  0.751  0.403  1.0
  O  O10  1  0.316  0.545  0.875  1.0
  O  O11  1  0.684  0.455  0.125  1.0
  O  O12  1  0.816  0.455  0.625  1.0
  O  O13  1  0.184  0.545  0.375  1.0
  O  O14  1  0.077  0.716  0.545  1.0
  O  O15  1  0.923  0.284  0.455  1.0
  O  O16  1  0.577  0.284  0.955  1.0
  O  O17  1  0.423  0.716  0.045  1.0
  O  O18  1  0.408  0.340  0.630  1.0
  O  O19  1  0.592  0.660  0.370  1.0
  O  O20  1  0.908  0.660  0.870  1.0
  O  O21  1  0.092  0.340  0.130  1.0
  O  O22  1  0.426  0.861  0.769  1.0
  O  O23  1  0.574  0.139  0.231  1.0
  O  O24  1  0.926  0.139  0.731  1.0
  O  O25  1  0.074  0.861  0.269  1.0
  O  O26  1  0.096  0.429  0.872  1.0
  O  O27  1  0.904  0.571  0.128  1.0
  O  O28  1  0.596  0.571  0.628  1.0
  O  O29  1  0.404  0.429  0.372  1.0
  O  O30  1  0.457  0.767  0.502  1.0
  O  O31  1  0.543  0.233  0.498  1.0
  O  O32  1  0.957  0.233  0.998  1.0
  O  O33  1  0.043  0.767  0.002  1.0
  O  O34  1  0.266  0.901  0.908  1.0
  O  O35  1  0.734  0.099  0.092  1.0
  O  O36  1  0.766  0.099  0.592  1.0
  O  O37  1  0.234  0.901  0.408  1.0
[/CIF]
.
The crystal structure described by Rb2Co(SO7)2 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded to one O(1), one O(3), one O(4), one O(5), two equivalent O(2), and two equivalent O(7) atoms to form distorted RbO8 hexagonal bipyramids that share corners with two equivalent Rb(1)O8 hexagonal bipyramids, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent S(1)O4 tetrahedra,  an edgeedge with one Rb(1)O8 hexagonal bipyramid, and edges with two equivalent S(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-40°. Co(1) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form distorted CoO6 octahedra that share corners with four equivalent Rb(1)O8 hexagonal bipyramids. S(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form SO4 tetrahedra that share corners with two equivalent Rb(1)O8 hexagonal bipyramids and edges with two equivalent Rb(1)O8 hexagonal bipyramids. There are seven inequivalent O sites. In the first O site, O(7) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one S(1) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Rb(1) and one S(1) atom. In the third O site, O(2) is bonded in a single-bond geometry to two equivalent Rb(1) and one S(1) atom. In the fourth O site, O(3) is bonded in a single-bond geometry to one Rb(1) and one Co(1) atom. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1) and one S(1) atom. In the sixth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1) and one Co(1) atom. In the seventh O site, O(6) is bonded in a single-bond geometry to one Co(1) atom. is represented by the CIF card [CIF]
data_Rb2Co(SO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.407
_cell_length_b   6.380
_cell_length_c   8.908
_cell_angle_alpha   76.821
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   686.551
_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
  Rb  Rb0  1  0.657  0.844  0.864  1.0
  Rb  Rb1  1  0.343  0.156  0.136  1.0
  Rb  Rb2  1  0.157  0.156  0.636  1.0
  Rb  Rb3  1  0.843  0.844  0.364  1.0
  Co  Co4  1  0.500  0.500  0.500  1.0
  Co  Co5  1  0.000  0.500  0.000  1.0
  S  S6  1  0.357  0.751  0.903  1.0
  S  S7  1  0.643  0.249  0.097  1.0
  S  S8  1  0.857  0.249  0.597  1.0
  S  S9  1  0.143  0.751  0.403  1.0
  O  O10  1  0.316  0.545  0.875  1.0
  O  O11  1  0.684  0.455  0.125  1.0
  O  O12  1  0.816  0.455  0.625  1.0
  O  O13  1  0.184  0.545  0.375  1.0
  O  O14  1  0.077  0.716  0.545  1.0
  O  O15  1  0.923  0.284  0.455  1.0
  O  O16  1  0.577  0.284  0.955  1.0
  O  O17  1  0.423  0.716  0.045  1.0
  O  O18  1  0.408  0.340  0.630  1.0
  O  O19  1  0.592  0.660  0.370  1.0
  O  O20  1  0.908  0.660  0.870  1.0
  O  O21  1  0.092  0.340  0.130  1.0
  O  O22  1  0.426  0.861  0.769  1.0
  O  O23  1  0.574  0.139  0.231  1.0
  O  O24  1  0.926  0.139  0.731  1.0
  O  O25  1  0.074  0.861  0.269  1.0
  O  O26  1  0.096  0.429  0.872  1.0
  O  O27  1  0.904  0.571  0.128  1.0
  O  O28  1  0.596  0.571  0.628  1.0
  O  O29  1  0.404  0.429  0.372  1.0
  O  O30  1  0.457  0.767  0.502  1.0
  O  O31  1  0.543  0.233  0.498  1.0
  O  O32  1  0.957  0.233  0.998  1.0
  O  O33  1  0.043  0.767  0.002  1.0
  O  O34  1  0.266  0.901  0.908  1.0
  O  O35  1  0.734  0.099  0.092  1.0
  O  O36  1  0.766  0.099  0.592  1.0
  O  O37  1  0.234  0.901  0.408  1.0
[/CIF]
.