The structure described by Rb2SnO3 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to two equivalent O(3) and three equivalent O(2) atoms to form distorted RbO5 trigonal bipyramids that share corners with four equivalent Rb(2)O7 pentagonal bipyramids, corners with five equivalent Sn(1)O4 tetrahedra, corners with two equivalent Rb(1)O5 trigonal bipyramids, edges with four equivalent Rb(2)O7 pentagonal bipyramids, and edges with three equivalent Rb(1)O5 trigonal bipyramids. In the second Rb site, Rb(2) is bonded to two equivalent O(1), two equivalent O(2), and three equivalent O(3) atoms to form distorted RbO7 pentagonal bipyramids that share corners with four equivalent Rb(2)O7 pentagonal bipyramids,  a cornercorner with one Sn(1)O4 tetrahedra, corners with four equivalent Rb(1)O5 trigonal bipyramids, edges with three equivalent Rb(2)O7 pentagonal bipyramids, edges with four equivalent Sn(1)O4 tetrahedra, and edges with four equivalent Rb(1)O5 trigonal bipyramids. Sn(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SnO4 tetrahedra that share  a cornercorner with one Rb(2)O7 pentagonal bipyramid, corners with two equivalent Sn(1)O4 tetrahedra, corners with five equivalent Rb(1)O5 trigonal bipyramids, and edges with four equivalent Rb(2)O7 pentagonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(2) and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded to two equivalent Rb(2), three equivalent Rb(1), and one Sn(1) atom to form a mixture of distorted corner and edge-sharing ORb5Sn octahedra. The corner-sharing octahedral tilt angles are 18°. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Rb(1), three equivalent Rb(2), and one Sn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2SnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.067
_cell_length_b   7.067
_cell_length_c   13.665
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   128.265
_symmetry_Int_Tables_number   1
_cell_volume   535.797
_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  0.948  0.052  0.136  1.0
  Rb  Rb1  1  0.873  0.127  0.576  1.0
  Rb  Rb2  1  0.627  0.373  0.076  1.0
  Rb  Rb3  1  0.448  0.552  0.364  1.0
  Rb  Rb4  1  0.052  0.948  0.864  1.0
  Rb  Rb5  1  0.373  0.627  0.924  1.0
  Rb  Rb6  1  0.552  0.448  0.636  1.0
  Rb  Rb7  1  0.127  0.873  0.424  1.0
  Sn  Sn8  1  0.759  0.241  0.337  1.0
  Sn  Sn9  1  0.741  0.259  0.837  1.0
  Sn  Sn10  1  0.259  0.741  0.163  1.0
  Sn  Sn11  1  0.241  0.759  0.663  1.0
  O  O12  1  0.465  0.035  0.250  1.0
  O  O13  1  0.035  0.465  0.750  1.0
  O  O14  1  0.911  0.089  0.359  1.0
  O  O15  1  0.659  0.341  0.445  1.0
  O  O16  1  0.341  0.659  0.555  1.0
  O  O17  1  0.159  0.841  0.055  1.0
  O  O18  1  0.841  0.159  0.945  1.0
  O  O19  1  0.589  0.411  0.859  1.0
  O  O20  1  0.411  0.589  0.141  1.0
  O  O21  1  0.089  0.911  0.641  1.0
  O  O22  1  0.965  0.535  0.250  1.0
  O  O23  1  0.535  0.965  0.750  1.0
[/CIF]
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The structure described by Rb2SnO3 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded to two equivalent O(3) and three equivalent O(2) atoms to form distorted RbO5 trigonal bipyramids that share corners with four equivalent Rb(2)O7 pentagonal bipyramids, corners with five equivalent Sn(1)O4 tetrahedra, corners with two equivalent Rb(1)O5 trigonal bipyramids, edges with four equivalent Rb(2)O7 pentagonal bipyramids, and edges with three equivalent Rb(1)O5 trigonal bipyramids. In the second Rb site, Rb(2) is bonded to two equivalent O(1), two equivalent O(2), and three equivalent O(3) atoms to form distorted RbO7 pentagonal bipyramids that share corners with four equivalent Rb(2)O7 pentagonal bipyramids,  a cornercorner with one Sn(1)O4 tetrahedra, corners with four equivalent Rb(1)O5 trigonal bipyramids, edges with three equivalent Rb(2)O7 pentagonal bipyramids, edges with four equivalent Sn(1)O4 tetrahedra, and edges with four equivalent Rb(1)O5 trigonal bipyramids. Sn(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SnO4 tetrahedra that share  a cornercorner with one Rb(2)O7 pentagonal bipyramid, corners with two equivalent Sn(1)O4 tetrahedra, corners with five equivalent Rb(1)O5 trigonal bipyramids, and edges with four equivalent Rb(2)O7 pentagonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(2) and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded to two equivalent Rb(2), three equivalent Rb(1), and one Sn(1) atom to form a mixture of distorted corner and edge-sharing ORb5Sn octahedra. The corner-sharing octahedral tilt angles are 18°. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Rb(1), three equivalent Rb(2), and one Sn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2SnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.067
_cell_length_b   7.067
_cell_length_c   13.665
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   128.265
_symmetry_Int_Tables_number   1
_cell_volume   535.797
_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  0.948  0.052  0.136  1.0
  Rb  Rb1  1  0.873  0.127  0.576  1.0
  Rb  Rb2  1  0.627  0.373  0.076  1.0
  Rb  Rb3  1  0.448  0.552  0.364  1.0
  Rb  Rb4  1  0.052  0.948  0.864  1.0
  Rb  Rb5  1  0.373  0.627  0.924  1.0
  Rb  Rb6  1  0.552  0.448  0.636  1.0
  Rb  Rb7  1  0.127  0.873  0.424  1.0
  Sn  Sn8  1  0.759  0.241  0.337  1.0
  Sn  Sn9  1  0.741  0.259  0.837  1.0
  Sn  Sn10  1  0.259  0.741  0.163  1.0
  Sn  Sn11  1  0.241  0.759  0.663  1.0
  O  O12  1  0.465  0.035  0.250  1.0
  O  O13  1  0.035  0.465  0.750  1.0
  O  O14  1  0.911  0.089  0.359  1.0
  O  O15  1  0.659  0.341  0.445  1.0
  O  O16  1  0.341  0.659  0.555  1.0
  O  O17  1  0.159  0.841  0.055  1.0
  O  O18  1  0.841  0.159  0.945  1.0
  O  O19  1  0.589  0.411  0.859  1.0
  O  O20  1  0.411  0.589  0.141  1.0
  O  O21  1  0.089  0.911  0.641  1.0
  O  O22  1  0.965  0.535  0.250  1.0
  O  O23  1  0.535  0.965  0.750  1.0
[/CIF]
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