The crystal structure described by Rb3Na(WO4)2 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a distorted hexagonal planar geometry to six equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to one O(2) and nine equivalent O(1) atoms. Na(1) is bonded to six equivalent O(1) atoms to form NaO6 octahedra that share corners with six equivalent W(1)O4 tetrahedra. W(1) is bonded to one O(2) and three equivalent O(1) atoms to form WO4 tetrahedra that share corners with three equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 18°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), three equivalent Rb(2), one Na(1), and one W(1) atom. In the second O site, O(2) is bonded in a linear geometry to one Rb(2) and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Na(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.358
_cell_length_b   6.358
_cell_length_c   8.023
_cell_angle_alpha   90.000
_cell_angle_beta   90.004
_cell_angle_gamma   120.001
_symmetry_Int_Tables_number   1
_cell_volume   280.876
_cell_formula_units_Z   1
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  0.000  0.000  0.500  1.0
  Rb  Rb1  1  0.333  0.667  0.831  1.0
  Rb  Rb2  1  0.667  0.333  0.169  1.0
  Na  Na3  1  0.000  0.000  0.000  1.0
  W  W4  1  0.333  0.667  0.276  1.0
  W  W5  1  0.667  0.333  0.724  1.0
  O  O6  1  0.179  0.822  0.195  1.0
  O  O7  1  0.179  0.357  0.195  1.0
  O  O8  1  0.643  0.822  0.195  1.0
  O  O9  1  0.821  0.178  0.805  1.0
  O  O10  1  0.821  0.643  0.805  1.0
  O  O11  1  0.357  0.178  0.805  1.0
  O  O12  1  0.333  0.667  0.501  1.0
  O  O13  1  0.667  0.333  0.499  1.0
[/CIF]
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The crystal structure described by Rb3Na(WO4)2 crystallizes in the trigonal P-3m1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a distorted hexagonal planar geometry to six equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to one O(2) and nine equivalent O(1) atoms. Na(1) is bonded to six equivalent O(1) atoms to form NaO6 octahedra that share corners with six equivalent W(1)O4 tetrahedra. W(1) is bonded to one O(2) and three equivalent O(1) atoms to form WO4 tetrahedra that share corners with three equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles are 18°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Rb(1), three equivalent Rb(2), one Na(1), and one W(1) atom. In the second O site, O(2) is bonded in a linear geometry to one Rb(2) and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Na(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.358
_cell_length_b   6.358
_cell_length_c   8.023
_cell_angle_alpha   90.000
_cell_angle_beta   90.004
_cell_angle_gamma   120.001
_symmetry_Int_Tables_number   1
_cell_volume   280.876
_cell_formula_units_Z   1
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  0.000  0.000  0.500  1.0
  Rb  Rb1  1  0.333  0.667  0.831  1.0
  Rb  Rb2  1  0.667  0.333  0.169  1.0
  Na  Na3  1  0.000  0.000  0.000  1.0
  W  W4  1  0.333  0.667  0.276  1.0
  W  W5  1  0.667  0.333  0.724  1.0
  O  O6  1  0.179  0.822  0.195  1.0
  O  O7  1  0.179  0.357  0.195  1.0
  O  O8  1  0.643  0.822  0.195  1.0
  O  O9  1  0.821  0.178  0.805  1.0
  O  O10  1  0.821  0.643  0.805  1.0
  O  O11  1  0.357  0.178  0.805  1.0
  O  O12  1  0.333  0.667  0.501  1.0
  O  O13  1  0.667  0.333  0.499  1.0
[/CIF]
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