The compound described by Rb2S2O7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(3), one O(6), one O(7), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form corner-sharing SO4 tetrahedra. In the second S site, S(2) is bonded to one O(1), one O(3), one O(6), and one O(7) atom to form corner-sharing SO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Rb(1), one S(1), and one S(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Rb(2) and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2S2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.484
_cell_length_b   7.613
_cell_length_c   14.987
_cell_angle_alpha   59.667
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   736.961
_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
  Rb  Rb0  1  0.196  0.684  0.129  1.0
  Rb  Rb1  1  0.866  0.199  0.159  1.0
  Rb  Rb2  1  0.366  0.801  0.341  1.0
  Rb  Rb3  1  0.696  0.316  0.371  1.0
  Rb  Rb4  1  0.304  0.684  0.629  1.0
  Rb  Rb5  1  0.634  0.199  0.659  1.0
  Rb  Rb6  1  0.134  0.801  0.841  1.0
  Rb  Rb7  1  0.804  0.316  0.871  1.0
  S  S8  1  0.323  0.240  0.082  1.0
  S  S9  1  0.704  0.757  0.114  1.0
  S  S10  1  0.204  0.243  0.386  1.0
  S  S11  1  0.823  0.760  0.418  1.0
  S  S12  1  0.177  0.240  0.582  1.0
  S  S13  1  0.796  0.757  0.614  1.0
  S  S14  1  0.296  0.243  0.886  1.0
  S  S15  1  0.677  0.760  0.918  1.0
  O  O16  1  0.587  0.759  0.020  1.0
  O  O17  1  0.216  0.423  0.041  1.0
  O  O18  1  0.803  0.945  0.068  1.0
  O  O19  1  0.480  0.237  0.137  1.0
  O  O20  1  0.217  0.056  0.133  1.0
  O  O21  1  0.816  0.579  0.155  1.0
  O  O22  1  0.562  0.742  0.182  1.0
  O  O23  1  0.062  0.258  0.318  1.0
  O  O24  1  0.717  0.944  0.367  1.0
  O  O25  1  0.980  0.763  0.363  1.0
  O  O26  1  0.316  0.421  0.345  1.0
  O  O27  1  0.303  0.055  0.432  1.0
  O  O28  1  0.716  0.577  0.459  1.0
  O  O29  1  0.087  0.241  0.480  1.0
  O  O30  1  0.913  0.759  0.520  1.0
  O  O31  1  0.284  0.423  0.541  1.0
  O  O32  1  0.697  0.945  0.568  1.0
  O  O33  1  0.684  0.579  0.655  1.0
  O  O34  1  0.020  0.237  0.637  1.0
  O  O35  1  0.283  0.056  0.633  1.0
  O  O36  1  0.938  0.742  0.682  1.0
  O  O37  1  0.438  0.258  0.818  1.0
  O  O38  1  0.184  0.421  0.845  1.0
  O  O39  1  0.783  0.944  0.867  1.0
  O  O40  1  0.520  0.763  0.863  1.0
  O  O41  1  0.197  0.055  0.932  1.0
  O  O42  1  0.784  0.577  0.959  1.0
  O  O43  1  0.413  0.241  0.980  1.0
[/CIF]
.
The compound described by Rb2S2O7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(3), one O(6), one O(7), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form corner-sharing SO4 tetrahedra. In the second S site, S(2) is bonded to one O(1), one O(3), one O(6), and one O(7) atom to form corner-sharing SO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Rb(1), one S(1), and one S(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Rb(2) and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one S(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one S(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2S2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.484
_cell_length_b   7.613
_cell_length_c   14.987
_cell_angle_alpha   59.667
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   736.961
_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
  Rb  Rb0  1  0.196  0.684  0.129  1.0
  Rb  Rb1  1  0.866  0.199  0.159  1.0
  Rb  Rb2  1  0.366  0.801  0.341  1.0
  Rb  Rb3  1  0.696  0.316  0.371  1.0
  Rb  Rb4  1  0.304  0.684  0.629  1.0
  Rb  Rb5  1  0.634  0.199  0.659  1.0
  Rb  Rb6  1  0.134  0.801  0.841  1.0
  Rb  Rb7  1  0.804  0.316  0.871  1.0
  S  S8  1  0.323  0.240  0.082  1.0
  S  S9  1  0.704  0.757  0.114  1.0
  S  S10  1  0.204  0.243  0.386  1.0
  S  S11  1  0.823  0.760  0.418  1.0
  S  S12  1  0.177  0.240  0.582  1.0
  S  S13  1  0.796  0.757  0.614  1.0
  S  S14  1  0.296  0.243  0.886  1.0
  S  S15  1  0.677  0.760  0.918  1.0
  O  O16  1  0.587  0.759  0.020  1.0
  O  O17  1  0.216  0.423  0.041  1.0
  O  O18  1  0.803  0.945  0.068  1.0
  O  O19  1  0.480  0.237  0.137  1.0
  O  O20  1  0.217  0.056  0.133  1.0
  O  O21  1  0.816  0.579  0.155  1.0
  O  O22  1  0.562  0.742  0.182  1.0
  O  O23  1  0.062  0.258  0.318  1.0
  O  O24  1  0.717  0.944  0.367  1.0
  O  O25  1  0.980  0.763  0.363  1.0
  O  O26  1  0.316  0.421  0.345  1.0
  O  O27  1  0.303  0.055  0.432  1.0
  O  O28  1  0.716  0.577  0.459  1.0
  O  O29  1  0.087  0.241  0.480  1.0
  O  O30  1  0.913  0.759  0.520  1.0
  O  O31  1  0.284  0.423  0.541  1.0
  O  O32  1  0.697  0.945  0.568  1.0
  O  O33  1  0.684  0.579  0.655  1.0
  O  O34  1  0.020  0.237  0.637  1.0
  O  O35  1  0.283  0.056  0.633  1.0
  O  O36  1  0.938  0.742  0.682  1.0
  O  O37  1  0.438  0.258  0.818  1.0
  O  O38  1  0.184  0.421  0.845  1.0
  O  O39  1  0.783  0.944  0.867  1.0
  O  O40  1  0.520  0.763  0.863  1.0
  O  O41  1  0.197  0.055  0.932  1.0
  O  O42  1  0.784  0.577  0.959  1.0
  O  O43  1  0.413  0.241  0.980  1.0
[/CIF]
.