The structure described by RbSm(SeO4)2 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(7), one O(8), two equivalent O(6), and three equivalent O(3) atoms. Sm(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(8), two equivalent O(2), two equivalent O(5), and two equivalent O(7) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second Se site, Se(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Sm(1) and one Se(2) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one Se(2) atom. In the third O site, O(7) is bonded in a 1-coordinate geometry to one Rb(1), two equivalent Sm(1), and one Se(1) atom. In the fourth O site, O(8) is bonded in a 3-coordinate geometry to one Rb(1), one Sm(1), and one Se(2) atom. In the fifth O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Sm(1), and one Se(1) atom. In the sixth O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one Se(1) atom. In the seventh O site, O(3) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one Se(1) atom. In the eighth O site, O(4) is bonded in a 3-coordinate geometry to one Rb(1), one Sm(1), and one Se(2) atom. is represented by the CIF file [CIF]
data_RbSm(SeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.454
_cell_length_b   9.319
_cell_length_c   11.155
_cell_angle_alpha   88.796
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   774.629
_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  0.355  0.436  0.841  1.0
  Rb  Rb1  1  0.645  0.564  0.159  1.0
  Rb  Rb2  1  0.855  0.564  0.659  1.0
  Rb  Rb3  1  0.145  0.436  0.341  1.0
  Sm  Sm4  1  0.168  0.947  0.848  1.0
  Sm  Sm5  1  0.832  0.053  0.152  1.0
  Sm  Sm6  1  0.668  0.053  0.652  1.0
  Sm  Sm7  1  0.332  0.947  0.348  1.0
  Se  Se8  1  0.167  0.178  0.609  1.0
  Se  Se9  1  0.833  0.822  0.391  1.0
  Se  Se10  1  0.667  0.822  0.891  1.0
  Se  Se11  1  0.333  0.178  0.109  1.0
  Se  Se12  1  0.342  0.735  0.588  1.0
  Se  Se13  1  0.658  0.265  0.412  1.0
  Se  Se14  1  0.842  0.265  0.912  1.0
  Se  Se15  1  0.158  0.735  0.088  1.0
  O  O16  1  0.828  0.885  0.530  1.0
  O  O17  1  0.172  0.115  0.470  1.0
  O  O18  1  0.328  0.115  0.970  1.0
  O  O19  1  0.672  0.885  0.030  1.0
  O  O20  1  0.503  0.909  0.813  1.0
  O  O21  1  0.497  0.091  0.187  1.0
  O  O22  1  0.003  0.091  0.687  1.0
  O  O23  1  0.997  0.909  0.313  1.0
  O  O24  1  0.148  0.354  0.605  1.0
  O  O25  1  0.852  0.646  0.395  1.0
  O  O26  1  0.648  0.646  0.895  1.0
  O  O27  1  0.352  0.354  0.105  1.0
  O  O28  1  0.259  0.718  0.954  1.0
  O  O29  1  0.741  0.282  0.046  1.0
  O  O30  1  0.759  0.282  0.546  1.0
  O  O31  1  0.241  0.718  0.454  1.0
  O  O32  1  0.455  0.889  0.554  1.0
  O  O33  1  0.545  0.111  0.446  1.0
  O  O34  1  0.955  0.111  0.946  1.0
  O  O35  1  0.045  0.889  0.054  1.0
  O  O36  1  0.472  0.601  0.627  1.0
  O  O37  1  0.528  0.399  0.373  1.0
  O  O38  1  0.972  0.399  0.873  1.0
  O  O39  1  0.028  0.601  0.127  1.0
  O  O40  1  0.845  0.872  0.803  1.0
  O  O41  1  0.155  0.128  0.197  1.0
  O  O42  1  0.345  0.128  0.697  1.0
  O  O43  1  0.655  0.872  0.303  1.0
  O  O44  1  0.188  0.767  0.695  1.0
  O  O45  1  0.812  0.233  0.305  1.0
  O  O46  1  0.688  0.233  0.805  1.0
  O  O47  1  0.312  0.767  0.195  1.0
[/CIF]
.
The structure described by RbSm(SeO4)2 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(7), one O(8), two equivalent O(6), and three equivalent O(3) atoms. Sm(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(8), two equivalent O(2), two equivalent O(5), and two equivalent O(7) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second Se site, Se(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Sm(1) and one Se(2) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one Se(2) atom. In the third O site, O(7) is bonded in a 1-coordinate geometry to one Rb(1), two equivalent Sm(1), and one Se(1) atom. In the fourth O site, O(8) is bonded in a 3-coordinate geometry to one Rb(1), one Sm(1), and one Se(2) atom. In the fifth O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), one Sm(1), and one Se(1) atom. In the sixth O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one Se(1) atom. In the seventh O site, O(3) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one Se(1) atom. In the eighth O site, O(4) is bonded in a 3-coordinate geometry to one Rb(1), one Sm(1), and one Se(2) atom. is represented by the CIF file [CIF]
data_RbSm(SeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.454
_cell_length_b   9.319
_cell_length_c   11.155
_cell_angle_alpha   88.796
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   774.629
_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  0.355  0.436  0.841  1.0
  Rb  Rb1  1  0.645  0.564  0.159  1.0
  Rb  Rb2  1  0.855  0.564  0.659  1.0
  Rb  Rb3  1  0.145  0.436  0.341  1.0
  Sm  Sm4  1  0.168  0.947  0.848  1.0
  Sm  Sm5  1  0.832  0.053  0.152  1.0
  Sm  Sm6  1  0.668  0.053  0.652  1.0
  Sm  Sm7  1  0.332  0.947  0.348  1.0
  Se  Se8  1  0.167  0.178  0.609  1.0
  Se  Se9  1  0.833  0.822  0.391  1.0
  Se  Se10  1  0.667  0.822  0.891  1.0
  Se  Se11  1  0.333  0.178  0.109  1.0
  Se  Se12  1  0.342  0.735  0.588  1.0
  Se  Se13  1  0.658  0.265  0.412  1.0
  Se  Se14  1  0.842  0.265  0.912  1.0
  Se  Se15  1  0.158  0.735  0.088  1.0
  O  O16  1  0.828  0.885  0.530  1.0
  O  O17  1  0.172  0.115  0.470  1.0
  O  O18  1  0.328  0.115  0.970  1.0
  O  O19  1  0.672  0.885  0.030  1.0
  O  O20  1  0.503  0.909  0.813  1.0
  O  O21  1  0.497  0.091  0.187  1.0
  O  O22  1  0.003  0.091  0.687  1.0
  O  O23  1  0.997  0.909  0.313  1.0
  O  O24  1  0.148  0.354  0.605  1.0
  O  O25  1  0.852  0.646  0.395  1.0
  O  O26  1  0.648  0.646  0.895  1.0
  O  O27  1  0.352  0.354  0.105  1.0
  O  O28  1  0.259  0.718  0.954  1.0
  O  O29  1  0.741  0.282  0.046  1.0
  O  O30  1  0.759  0.282  0.546  1.0
  O  O31  1  0.241  0.718  0.454  1.0
  O  O32  1  0.455  0.889  0.554  1.0
  O  O33  1  0.545  0.111  0.446  1.0
  O  O34  1  0.955  0.111  0.946  1.0
  O  O35  1  0.045  0.889  0.054  1.0
  O  O36  1  0.472  0.601  0.627  1.0
  O  O37  1  0.528  0.399  0.373  1.0
  O  O38  1  0.972  0.399  0.873  1.0
  O  O39  1  0.028  0.601  0.127  1.0
  O  O40  1  0.845  0.872  0.803  1.0
  O  O41  1  0.155  0.128  0.197  1.0
  O  O42  1  0.345  0.128  0.697  1.0
  O  O43  1  0.655  0.872  0.303  1.0
  O  O44  1  0.188  0.767  0.695  1.0
  O  O45  1  0.812  0.233  0.305  1.0
  O  O46  1  0.688  0.233  0.805  1.0
  O  O47  1  0.312  0.767  0.195  1.0
[/CIF]
.