The material structure described by Na8SnO6 crystallizes in the trigonal R-3 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. In the second Na site, Na(2) is bonded to four equivalent O(1) atoms to form distorted NaO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with six equivalent Na(2)O4 tetrahedra,  an edgeedge with one Sn(1)O6 octahedra, and edges with three equivalent Na(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 17-54°. Sn(1) is bonded to six equivalent O(1) atoms to form SnO6 octahedra that share corners with twelve equivalent Na(2)O4 tetrahedra and edges with six equivalent Na(2)O4 tetrahedra. O(1) is bonded in a 7-coordinate geometry to two equivalent Na(1), four equivalent Na(2), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Na8SnO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.773
_cell_length_b   6.773
_cell_length_c   6.773
_cell_angle_alpha   55.931
_cell_angle_beta   55.931
_cell_angle_gamma   55.931
_symmetry_Int_Tables_number   1
_cell_volume   198.947
_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
  Na  Na0  1  0.341  0.341  0.341  1.0
  Na  Na1  1  0.754  0.093  0.498  1.0
  Na  Na2  1  0.502  0.246  0.907  1.0
  Na  Na3  1  0.907  0.502  0.246  1.0
  Na  Na4  1  0.093  0.498  0.754  1.0
  Na  Na5  1  0.498  0.754  0.093  1.0
  Na  Na6  1  0.246  0.907  0.502  1.0
  Na  Na7  1  0.659  0.659  0.659  1.0
  Sn  Sn8  1  0.000  0.000  0.000  1.0
  O  O9  1  0.913  0.221  0.648  1.0
  O  O10  1  0.779  0.352  0.087  1.0
  O  O11  1  0.352  0.087  0.779  1.0
  O  O12  1  0.648  0.913  0.221  1.0
  O  O13  1  0.221  0.648  0.913  1.0
  O  O14  1  0.087  0.779  0.352  1.0
[/CIF]
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The material structure described by Na8SnO6 crystallizes in the trigonal R-3 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. In the second Na site, Na(2) is bonded to four equivalent O(1) atoms to form distorted NaO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with six equivalent Na(2)O4 tetrahedra,  an edgeedge with one Sn(1)O6 octahedra, and edges with three equivalent Na(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 17-54°. Sn(1) is bonded to six equivalent O(1) atoms to form SnO6 octahedra that share corners with twelve equivalent Na(2)O4 tetrahedra and edges with six equivalent Na(2)O4 tetrahedra. O(1) is bonded in a 7-coordinate geometry to two equivalent Na(1), four equivalent Na(2), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Na8SnO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.773
_cell_length_b   6.773
_cell_length_c   6.773
_cell_angle_alpha   55.931
_cell_angle_beta   55.931
_cell_angle_gamma   55.931
_symmetry_Int_Tables_number   1
_cell_volume   198.947
_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
  Na  Na0  1  0.341  0.341  0.341  1.0
  Na  Na1  1  0.754  0.093  0.498  1.0
  Na  Na2  1  0.502  0.246  0.907  1.0
  Na  Na3  1  0.907  0.502  0.246  1.0
  Na  Na4  1  0.093  0.498  0.754  1.0
  Na  Na5  1  0.498  0.754  0.093  1.0
  Na  Na6  1  0.246  0.907  0.502  1.0
  Na  Na7  1  0.659  0.659  0.659  1.0
  Sn  Sn8  1  0.000  0.000  0.000  1.0
  O  O9  1  0.913  0.221  0.648  1.0
  O  O10  1  0.779  0.352  0.087  1.0
  O  O11  1  0.352  0.087  0.779  1.0
  O  O12  1  0.648  0.913  0.221  1.0
  O  O13  1  0.221  0.648  0.913  1.0
  O  O14  1  0.087  0.779  0.352  1.0
[/CIF]
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