The material described by Na2SnF6 is Hydrophilite-derived structured and crystallizes in the tetragonal P4_2/mnm space group. Na(1) is bonded to two equivalent F(1) and four equivalent F(2) atoms to form NaF6 octahedra that share corners with four equivalent Na(1)F6 octahedra, corners with four equivalent Sn(1)F6 octahedra,  an edgeedge with one Na(1)F6 octahedra, and  an edgeedge with one Sn(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 43-60°. Sn(1) is bonded to two equivalent F(1) and four equivalent F(2) atoms to form SnF6 octahedra that share corners with eight equivalent Na(1)F6 octahedra and edges with two equivalent Na(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 43-46°. There are two inequivalent F sites. In the first F site, F(2) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one Sn(1) atom. In the second F site, F(1) is bonded in a distorted T-shaped geometry to two equivalent Na(1) and one Sn(1) atom. is represented by the CIF file [CIF]
data_Na2SnF6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.023
_cell_length_b   5.023
_cell_length_c   10.031
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   253.039
_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
  Na  Na0  1  0.000  0.000  0.336  1.0
  Na  Na1  1  0.500  0.500  0.836  1.0
  Na  Na2  1  0.000  0.000  0.664  1.0
  Na  Na3  1  0.500  0.500  0.164  1.0
  Sn  Sn4  1  0.000  0.000  0.000  1.0
  Sn  Sn5  1  0.500  0.500  0.500  1.0
  F  F6  1  0.721  0.721  0.000  1.0
  F  F7  1  0.779  0.221  0.500  1.0
  F  F8  1  0.221  0.779  0.500  1.0
  F  F9  1  0.279  0.279  0.000  1.0
  F  F10  1  0.688  0.688  0.354  1.0
  F  F11  1  0.312  0.312  0.354  1.0
  F  F12  1  0.312  0.312  0.646  1.0
  F  F13  1  0.188  0.812  0.146  1.0
  F  F14  1  0.812  0.188  0.146  1.0
  F  F15  1  0.812  0.188  0.854  1.0
  F  F16  1  0.188  0.812  0.854  1.0
  F  F17  1  0.688  0.688  0.646  1.0
[/CIF]
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The material described by Na2SnF6 is Hydrophilite-derived structured and crystallizes in the tetragonal P4_2/mnm space group. Na(1) is bonded to two equivalent F(1) and four equivalent F(2) atoms to form NaF6 octahedra that share corners with four equivalent Na(1)F6 octahedra, corners with four equivalent Sn(1)F6 octahedra,  an edgeedge with one Na(1)F6 octahedra, and  an edgeedge with one Sn(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 43-60°. Sn(1) is bonded to two equivalent F(1) and four equivalent F(2) atoms to form SnF6 octahedra that share corners with eight equivalent Na(1)F6 octahedra and edges with two equivalent Na(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 43-46°. There are two inequivalent F sites. In the first F site, F(2) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one Sn(1) atom. In the second F site, F(1) is bonded in a distorted T-shaped geometry to two equivalent Na(1) and one Sn(1) atom. is represented by the CIF file [CIF]
data_Na2SnF6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.023
_cell_length_b   5.023
_cell_length_c   10.031
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   253.039
_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
  Na  Na0  1  0.000  0.000  0.336  1.0
  Na  Na1  1  0.500  0.500  0.836  1.0
  Na  Na2  1  0.000  0.000  0.664  1.0
  Na  Na3  1  0.500  0.500  0.164  1.0
  Sn  Sn4  1  0.000  0.000  0.000  1.0
  Sn  Sn5  1  0.500  0.500  0.500  1.0
  F  F6  1  0.721  0.721  0.000  1.0
  F  F7  1  0.779  0.221  0.500  1.0
  F  F8  1  0.221  0.779  0.500  1.0
  F  F9  1  0.279  0.279  0.000  1.0
  F  F10  1  0.688  0.688  0.354  1.0
  F  F11  1  0.312  0.312  0.354  1.0
  F  F12  1  0.312  0.312  0.646  1.0
  F  F13  1  0.188  0.812  0.146  1.0
  F  F14  1  0.812  0.188  0.146  1.0
  F  F15  1  0.812  0.188  0.854  1.0
  F  F16  1  0.188  0.812  0.854  1.0
  F  F17  1  0.688  0.688  0.646  1.0
[/CIF]
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