The structure described by Rb3Ga2(Se2O7)2 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(3), and four equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a distorted linear geometry to two equivalent O(5) and four equivalent O(3) atoms. Ga(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing GaO6 octahedra. The corner-sharing octahedral tilt angles are 39°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(5) and two equivalent O(1) atoms. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4) and two equivalent O(3) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one Ga(1), and one Se(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent Ga(1) atoms. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ga(1), and one Se(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Rb(1) and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Rb(2) and one Se(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Ga2(Se2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.777
_cell_length_b   9.777
_cell_length_c   13.589
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   136.363
_symmetry_Int_Tables_number   1
_cell_volume   896.353
_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  0.316  0.684  0.535  1.0
  Rb  Rb1  1  0.684  0.316  0.465  1.0
  Rb  Rb2  1  0.184  0.816  0.035  1.0
  Rb  Rb3  1  0.816  0.184  0.965  1.0
  Rb  Rb4  1  0.000  0.000  0.500  1.0
  Rb  Rb5  1  0.500  0.500  0.000  1.0
  Ga  Ga6  1  0.421  0.079  0.750  1.0
  Ga  Ga7  1  0.079  0.421  0.250  1.0
  Ga  Ga8  1  0.579  0.921  0.250  1.0
  Ga  Ga9  1  0.921  0.579  0.750  1.0
  Se  Se10  1  0.805  0.195  0.670  1.0
  Se  Se11  1  0.195  0.805  0.330  1.0
  Se  Se12  1  0.695  0.305  0.170  1.0
  Se  Se13  1  0.305  0.695  0.830  1.0
  Se  Se14  1  0.538  0.462  0.678  1.0
  Se  Se15  1  0.462  0.538  0.322  1.0
  Se  Se16  1  0.962  0.038  0.178  1.0
  Se  Se17  1  0.038  0.962  0.822  1.0
  O  O18  1  0.560  0.064  0.647  1.0
  O  O19  1  0.064  0.560  0.353  1.0
  O  O20  1  0.564  0.060  0.147  1.0
  O  O21  1  0.060  0.564  0.853  1.0
  O  O22  1  0.440  0.936  0.353  1.0
  O  O23  1  0.936  0.440  0.647  1.0
  O  O24  1  0.436  0.940  0.853  1.0
  O  O25  1  0.940  0.436  0.147  1.0
  O  O26  1  0.175  0.825  0.702  1.0
  O  O27  1  0.825  0.175  0.298  1.0
  O  O28  1  0.325  0.675  0.202  1.0
  O  O29  1  0.675  0.325  0.798  1.0
  O  O30  1  0.401  0.219  0.647  1.0
  O  O31  1  0.219  0.401  0.353  1.0
  O  O32  1  0.719  0.901  0.147  1.0
  O  O33  1  0.901  0.719  0.853  1.0
  O  O34  1  0.599  0.781  0.353  1.0
  O  O35  1  0.781  0.599  0.647  1.0
  O  O36  1  0.281  0.099  0.853  1.0
  O  O37  1  0.099  0.281  0.147  1.0
  O  O38  1  0.468  0.532  0.597  1.0
  O  O39  1  0.532  0.468  0.403  1.0
  O  O40  1  0.032  0.968  0.097  1.0
  O  O41  1  0.968  0.032  0.903  1.0
  O  O42  1  0.859  0.141  0.570  1.0
  O  O43  1  0.141  0.859  0.430  1.0
  O  O44  1  0.641  0.359  0.070  1.0
  O  O45  1  0.359  0.641  0.930  1.0
[/CIF]
.
The structure described by Rb3Ga2(Se2O7)2 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(3), and four equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a distorted linear geometry to two equivalent O(5) and four equivalent O(3) atoms. Ga(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing GaO6 octahedra. The corner-sharing octahedral tilt angles are 39°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(5) and two equivalent O(1) atoms. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4) and two equivalent O(3) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Rb(1), one Ga(1), and one Se(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent Ga(1) atoms. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one Ga(1), and one Se(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Rb(1) and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Rb(2) and one Se(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Ga2(Se2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.777
_cell_length_b   9.777
_cell_length_c   13.589
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   136.363
_symmetry_Int_Tables_number   1
_cell_volume   896.353
_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  0.316  0.684  0.535  1.0
  Rb  Rb1  1  0.684  0.316  0.465  1.0
  Rb  Rb2  1  0.184  0.816  0.035  1.0
  Rb  Rb3  1  0.816  0.184  0.965  1.0
  Rb  Rb4  1  0.000  0.000  0.500  1.0
  Rb  Rb5  1  0.500  0.500  0.000  1.0
  Ga  Ga6  1  0.421  0.079  0.750  1.0
  Ga  Ga7  1  0.079  0.421  0.250  1.0
  Ga  Ga8  1  0.579  0.921  0.250  1.0
  Ga  Ga9  1  0.921  0.579  0.750  1.0
  Se  Se10  1  0.805  0.195  0.670  1.0
  Se  Se11  1  0.195  0.805  0.330  1.0
  Se  Se12  1  0.695  0.305  0.170  1.0
  Se  Se13  1  0.305  0.695  0.830  1.0
  Se  Se14  1  0.538  0.462  0.678  1.0
  Se  Se15  1  0.462  0.538  0.322  1.0
  Se  Se16  1  0.962  0.038  0.178  1.0
  Se  Se17  1  0.038  0.962  0.822  1.0
  O  O18  1  0.560  0.064  0.647  1.0
  O  O19  1  0.064  0.560  0.353  1.0
  O  O20  1  0.564  0.060  0.147  1.0
  O  O21  1  0.060  0.564  0.853  1.0
  O  O22  1  0.440  0.936  0.353  1.0
  O  O23  1  0.936  0.440  0.647  1.0
  O  O24  1  0.436  0.940  0.853  1.0
  O  O25  1  0.940  0.436  0.147  1.0
  O  O26  1  0.175  0.825  0.702  1.0
  O  O27  1  0.825  0.175  0.298  1.0
  O  O28  1  0.325  0.675  0.202  1.0
  O  O29  1  0.675  0.325  0.798  1.0
  O  O30  1  0.401  0.219  0.647  1.0
  O  O31  1  0.219  0.401  0.353  1.0
  O  O32  1  0.719  0.901  0.147  1.0
  O  O33  1  0.901  0.719  0.853  1.0
  O  O34  1  0.599  0.781  0.353  1.0
  O  O35  1  0.781  0.599  0.647  1.0
  O  O36  1  0.281  0.099  0.853  1.0
  O  O37  1  0.099  0.281  0.147  1.0
  O  O38  1  0.468  0.532  0.597  1.0
  O  O39  1  0.532  0.468  0.403  1.0
  O  O40  1  0.032  0.968  0.097  1.0
  O  O41  1  0.968  0.032  0.903  1.0
  O  O42  1  0.859  0.141  0.570  1.0
  O  O43  1  0.141  0.859  0.430  1.0
  O  O44  1  0.641  0.359  0.070  1.0
  O  O45  1  0.359  0.641  0.930  1.0
[/CIF]
.