The crystal structure described by Rb2SeO4 crystallizes in the monoclinic Cc space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one Se(1), one O(2), one O(3), one O(4), and two equivalent O(1) atoms. Se(1) is bonded in a water-like geometry to one Rb(2), one O(1), and one O(2) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Rb(2) and one Se(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), and one Se(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Rb(2), two equivalent Rb(1), and one O(4) atom. In the fourth O site, O(4) is bonded to one Rb(2), two equivalent Rb(1), and one O(3) atom to form distorted corner-sharing ORb3O trigonal pyramids. is represented by the CIF card [CIF]
data_Rb2SeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.203
_cell_length_b   5.008
_cell_length_c   17.287
_cell_angle_alpha   78.893
_cell_angle_beta   95.320
_cell_angle_gamma   118.770
_symmetry_Int_Tables_number   1
_cell_volume   387.439
_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  0.919  0.047  0.476  1.0
  Rb  Rb1  1  0.081  0.128  0.976  1.0
  Rb  Rb2  1  0.346  0.767  0.666  1.0
  Rb  Rb3  1  0.654  0.421  0.166  1.0
  Se  Se4  1  0.298  0.636  0.299  1.0
  Se  Se5  1  0.702  0.338  0.799  1.0
  O  O6  1  0.214  0.833  0.217  1.0
  O  O7  1  0.017  0.265  0.312  1.0
  O  O8  1  0.383  0.764  0.029  1.0
  O  O9  1  0.435  0.494  0.540  1.0
  O  O10  1  0.565  0.059  0.040  1.0
  O  O11  1  0.617  0.381  0.529  1.0
  O  O12  1  0.786  0.619  0.717  1.0
  O  O13  1  0.983  0.249  0.812  1.0
[/CIF]
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The crystal structure described by Rb2SeO4 crystallizes in the monoclinic Cc space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Rb site, Rb(2) is bonded in a 6-coordinate geometry to one Se(1), one O(2), one O(3), one O(4), and two equivalent O(1) atoms. Se(1) is bonded in a water-like geometry to one Rb(2), one O(1), and one O(2) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Rb(2) and one Se(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), and one Se(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Rb(2), two equivalent Rb(1), and one O(4) atom. In the fourth O site, O(4) is bonded to one Rb(2), two equivalent Rb(1), and one O(3) atom to form distorted corner-sharing ORb3O trigonal pyramids. is represented by the CIF card [CIF]
data_Rb2SeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.203
_cell_length_b   5.008
_cell_length_c   17.287
_cell_angle_alpha   78.893
_cell_angle_beta   95.320
_cell_angle_gamma   118.770
_symmetry_Int_Tables_number   1
_cell_volume   387.439
_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  0.919  0.047  0.476  1.0
  Rb  Rb1  1  0.081  0.128  0.976  1.0
  Rb  Rb2  1  0.346  0.767  0.666  1.0
  Rb  Rb3  1  0.654  0.421  0.166  1.0
  Se  Se4  1  0.298  0.636  0.299  1.0
  Se  Se5  1  0.702  0.338  0.799  1.0
  O  O6  1  0.214  0.833  0.217  1.0
  O  O7  1  0.017  0.265  0.312  1.0
  O  O8  1  0.383  0.764  0.029  1.0
  O  O9  1  0.435  0.494  0.540  1.0
  O  O10  1  0.565  0.059  0.040  1.0
  O  O11  1  0.617  0.381  0.529  1.0
  O  O12  1  0.786  0.619  0.717  1.0
  O  O13  1  0.983  0.249  0.812  1.0
[/CIF]
.