The structure described by RbNa2BO3 crystallizes in the orthorhombic Pmmn space group. Rb(1) is bonded in a 2-coordinate geometry to two equivalent O(2) atoms. Na(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. B(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to four equivalent Na(1) and one B(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to two equivalent Rb(1), two equivalent Na(1), and one B(1) atom. is represented by the CIF file [CIF]
data_RbNa2BO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.630
_cell_length_b   5.740
_cell_length_c   6.199
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   200.357
_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  0.894  0.500  0.500  1.0
  Rb  Rb1  1  0.106  0.000  0.000  1.0
  Na  Na2  1  0.365  0.500  0.769  1.0
  Na  Na3  1  0.365  0.500  0.231  1.0
  Na  Na4  1  0.635  0.000  0.731  1.0
  Na  Na5  1  0.635  0.000  0.269  1.0
  B  B6  1  0.787  0.500  0.000  1.0
  B  B7  1  0.213  0.000  0.500  1.0
  O  O8  1  0.656  0.291  0.000  1.0
  O  O9  1  0.344  0.209  0.500  1.0
  O  O10  1  0.034  0.500  0.000  1.0
  O  O11  1  0.966  0.000  0.500  1.0
  O  O12  1  0.344  0.791  0.500  1.0
  O  O13  1  0.656  0.709  0.000  1.0
[/CIF]
.
The structure described by RbNa2BO3 crystallizes in the orthorhombic Pmmn space group. Rb(1) is bonded in a 2-coordinate geometry to two equivalent O(2) atoms. Na(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. B(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to four equivalent Na(1) and one B(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to two equivalent Rb(1), two equivalent Na(1), and one B(1) atom. is represented by the CIF file [CIF]
data_RbNa2BO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.630
_cell_length_b   5.740
_cell_length_c   6.199
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   200.357
_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  0.894  0.500  0.500  1.0
  Rb  Rb1  1  0.106  0.000  0.000  1.0
  Na  Na2  1  0.365  0.500  0.769  1.0
  Na  Na3  1  0.365  0.500  0.231  1.0
  Na  Na4  1  0.635  0.000  0.731  1.0
  Na  Na5  1  0.635  0.000  0.269  1.0
  B  B6  1  0.787  0.500  0.000  1.0
  B  B7  1  0.213  0.000  0.500  1.0
  O  O8  1  0.656  0.291  0.000  1.0
  O  O9  1  0.344  0.209  0.500  1.0
  O  O10  1  0.034  0.500  0.000  1.0
  O  O11  1  0.966  0.000  0.500  1.0
  O  O12  1  0.344  0.791  0.500  1.0
  O  O13  1  0.656  0.709  0.000  1.0
[/CIF]
.