The material described by Rb2SeO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to two equivalent O(2), three equivalent O(3), and four equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to one O(3), three equivalent O(2), and six equivalent O(1) atoms. Se(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1), three equivalent Rb(2), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1), three equivalent Rb(2), and one Se(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Rb(2), three equivalent Rb(1), and one Se(1) atom. is represented by the CIF file [CIF]
data_Rb2SeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.152
_cell_length_b   7.976
_cell_length_c   10.789
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   529.367
_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  0.250  0.008  0.296  1.0
  Rb  Rb1  1  0.750  0.992  0.704  1.0
  Rb  Rb2  1  0.250  0.508  0.204  1.0
  Rb  Rb3  1  0.750  0.492  0.796  1.0
  Rb  Rb4  1  0.250  0.333  0.587  1.0
  Rb  Rb5  1  0.750  0.667  0.413  1.0
  Rb  Rb6  1  0.250  0.833  0.913  1.0
  Rb  Rb7  1  0.750  0.167  0.087  1.0
  Se  Se8  1  0.250  0.772  0.580  1.0
  Se  Se9  1  0.750  0.228  0.420  1.0
  Se  Se10  1  0.250  0.272  0.920  1.0
  Se  Se11  1  0.750  0.728  0.080  1.0
  O  O12  1  0.530  0.299  0.348  1.0
  O  O13  1  0.030  0.701  0.652  1.0
  O  O14  1  0.970  0.799  0.152  1.0
  O  O15  1  0.470  0.201  0.848  1.0
  O  O16  1  0.470  0.701  0.652  1.0
  O  O17  1  0.970  0.299  0.348  1.0
  O  O18  1  0.030  0.201  0.848  1.0
  O  O19  1  0.530  0.799  0.152  1.0
  O  O20  1  0.250  0.697  0.437  1.0
  O  O21  1  0.750  0.303  0.563  1.0
  O  O22  1  0.250  0.197  0.063  1.0
  O  O23  1  0.750  0.803  0.937  1.0
  O  O24  1  0.750  0.522  0.081  1.0
  O  O25  1  0.250  0.478  0.919  1.0
  O  O26  1  0.750  0.022  0.419  1.0
  O  O27  1  0.250  0.978  0.581  1.0
[/CIF]
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The material described by Rb2SeO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to two equivalent O(2), three equivalent O(3), and four equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to one O(3), three equivalent O(2), and six equivalent O(1) atoms. Se(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(1), three equivalent Rb(2), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1), three equivalent Rb(2), and one Se(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Rb(2), three equivalent Rb(1), and one Se(1) atom. is represented by the CIF file [CIF]
data_Rb2SeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.152
_cell_length_b   7.976
_cell_length_c   10.789
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   529.367
_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  0.250  0.008  0.296  1.0
  Rb  Rb1  1  0.750  0.992  0.704  1.0
  Rb  Rb2  1  0.250  0.508  0.204  1.0
  Rb  Rb3  1  0.750  0.492  0.796  1.0
  Rb  Rb4  1  0.250  0.333  0.587  1.0
  Rb  Rb5  1  0.750  0.667  0.413  1.0
  Rb  Rb6  1  0.250  0.833  0.913  1.0
  Rb  Rb7  1  0.750  0.167  0.087  1.0
  Se  Se8  1  0.250  0.772  0.580  1.0
  Se  Se9  1  0.750  0.228  0.420  1.0
  Se  Se10  1  0.250  0.272  0.920  1.0
  Se  Se11  1  0.750  0.728  0.080  1.0
  O  O12  1  0.530  0.299  0.348  1.0
  O  O13  1  0.030  0.701  0.652  1.0
  O  O14  1  0.970  0.799  0.152  1.0
  O  O15  1  0.470  0.201  0.848  1.0
  O  O16  1  0.470  0.701  0.652  1.0
  O  O17  1  0.970  0.299  0.348  1.0
  O  O18  1  0.030  0.201  0.848  1.0
  O  O19  1  0.530  0.799  0.152  1.0
  O  O20  1  0.250  0.697  0.437  1.0
  O  O21  1  0.750  0.303  0.563  1.0
  O  O22  1  0.250  0.197  0.063  1.0
  O  O23  1  0.750  0.803  0.937  1.0
  O  O24  1  0.750  0.522  0.081  1.0
  O  O25  1  0.250  0.478  0.919  1.0
  O  O26  1  0.750  0.022  0.419  1.0
  O  O27  1  0.250  0.978  0.581  1.0
[/CIF]
.