The structure described by Na2Sn2Si2SO12 crystallizes in the monoclinic Cc space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(4), one O(6), one O(7), one O(8), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a distorted hexagonal planar geometry to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(2), one O(3), one O(7), one O(8), and one O(9) atom to form SnO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent S(1)O4 tetrahedra. In the second Sn site, Sn(2) is bonded to one O(10), one O(11), one O(12), one O(4), one O(5), and one O(6) atom to form SnO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent S(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(2), one O(5), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-41°. In the second Si site, Si(2) is bonded to one O(12), one O(3), one O(4), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-38°. S(1) is bonded to one O(1), one O(10), one O(6), and one O(9) atom to form SO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-34°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Sn(1) and one S(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Sn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Sn(1) and one Si(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Sn(2), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Sn(2) and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Sn(2), and one S(1) atom. In the seventh O site, O(7) is bonded to one Na(1), one Na(2), one Sn(1), and one Si(2) atom to form distorted face-sharing ONa2SiSn trigonal pyramids. In the eighth O site, O(8) is bonded to one Na(1), one Na(2), one Sn(1), and one Si(1) atom to form distorted face-sharing ONa2SiSn trigonal pyramids. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(2), one Sn(1), and one S(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Sn(2), and one S(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(2), one Sn(2), and one Si(1) atom. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Sn(2), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Si2Sn2SO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.950
_cell_length_b   8.957
_cell_length_c   9.185
_cell_angle_alpha   60.828
_cell_angle_beta   60.845
_cell_angle_gamma   60.025
_symmetry_Int_Tables_number   1
_cell_volume   527.224
_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  0.628  0.887  0.239  1.0
  Na  Na1  1  0.746  0.387  0.739  1.0
  Na  Na2  1  0.511  0.478  0.499  1.0
  Na  Na3  1  0.013  0.978  0.999  1.0
  O  O4  1  0.271  0.118  0.089  1.0
  O  O5  1  0.530  0.262  0.073  1.0
  O  O6  1  0.129  0.507  0.079  1.0
  O  O7  1  0.635  0.762  0.573  1.0
  O  O8  1  0.022  0.618  0.589  1.0
  O  O9  1  0.786  0.007  0.579  1.0
  O  O10  1  0.721  0.869  0.937  1.0
  O  O11  1  0.490  0.724  0.921  1.0
  O  O12  1  0.884  0.482  0.907  1.0
  O  O13  1  0.365  0.224  0.421  1.0
  O  O14  1  0.973  0.369  0.437  1.0
  O  O15  1  0.226  0.982  0.407  1.0
  O  O16  1  0.565  0.229  0.768  1.0
  O  O17  1  0.436  0.576  0.760  1.0
  O  O18  1  0.214  0.429  0.768  1.0
  O  O19  1  0.729  0.076  0.260  1.0
  O  O20  1  0.938  0.729  0.268  1.0
  O  O21  1  0.089  0.929  0.268  1.0
  O  O22  1  0.411  0.794  0.235  1.0
  O  O23  1  0.565  0.433  0.234  1.0
  O  O24  1  0.763  0.583  0.238  1.0
  O  O25  1  0.268  0.933  0.734  1.0
  O  O26  1  0.060  0.294  0.735  1.0
  O  O27  1  0.916  0.083  0.738  1.0
  S  S28  1  0.247  0.960  0.248  1.0
  S  S29  1  0.046  0.460  0.748  1.0
  Si  Si30  1  0.541  0.256  0.250  1.0
  Si  Si31  1  0.958  0.541  0.255  1.0
  Si  Si32  1  0.453  0.756  0.750  1.0
  Si  Si33  1  0.747  0.041  0.755  1.0
  Sn  Sn34  1  0.358  0.362  0.943  1.0
  Sn  Sn35  1  0.837  0.862  0.443  1.0
  Sn  Sn36  1  0.649  0.646  0.058  1.0
  Sn  Sn37  1  0.147  0.146  0.558  1.0
[/CIF]
.
The structure described by Na2Sn2Si2SO12 crystallizes in the monoclinic Cc space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 8-coordinate geometry to one O(10), one O(12), one O(4), one O(6), one O(7), one O(8), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a distorted hexagonal planar geometry to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(2), one O(3), one O(7), one O(8), and one O(9) atom to form SnO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent S(1)O4 tetrahedra. In the second Sn site, Sn(2) is bonded to one O(10), one O(11), one O(12), one O(4), one O(5), and one O(6) atom to form SnO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent S(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(2), one O(5), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-41°. In the second Si site, Si(2) is bonded to one O(12), one O(3), one O(4), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-38°. S(1) is bonded to one O(1), one O(10), one O(6), and one O(9) atom to form SO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-34°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Sn(1) and one S(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Sn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Sn(1) and one Si(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Sn(2), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Sn(2) and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Sn(2), and one S(1) atom. In the seventh O site, O(7) is bonded to one Na(1), one Na(2), one Sn(1), and one Si(2) atom to form distorted face-sharing ONa2SiSn trigonal pyramids. In the eighth O site, O(8) is bonded to one Na(1), one Na(2), one Sn(1), and one Si(1) atom to form distorted face-sharing ONa2SiSn trigonal pyramids. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(2), one Sn(1), and one S(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Sn(2), and one S(1) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(2), one Sn(2), and one Si(1) atom. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Sn(2), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Si2Sn2SO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.950
_cell_length_b   8.957
_cell_length_c   9.185
_cell_angle_alpha   60.828
_cell_angle_beta   60.845
_cell_angle_gamma   60.025
_symmetry_Int_Tables_number   1
_cell_volume   527.224
_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  0.628  0.887  0.239  1.0
  Na  Na1  1  0.746  0.387  0.739  1.0
  Na  Na2  1  0.511  0.478  0.499  1.0
  Na  Na3  1  0.013  0.978  0.999  1.0
  O  O4  1  0.271  0.118  0.089  1.0
  O  O5  1  0.530  0.262  0.073  1.0
  O  O6  1  0.129  0.507  0.079  1.0
  O  O7  1  0.635  0.762  0.573  1.0
  O  O8  1  0.022  0.618  0.589  1.0
  O  O9  1  0.786  0.007  0.579  1.0
  O  O10  1  0.721  0.869  0.937  1.0
  O  O11  1  0.490  0.724  0.921  1.0
  O  O12  1  0.884  0.482  0.907  1.0
  O  O13  1  0.365  0.224  0.421  1.0
  O  O14  1  0.973  0.369  0.437  1.0
  O  O15  1  0.226  0.982  0.407  1.0
  O  O16  1  0.565  0.229  0.768  1.0
  O  O17  1  0.436  0.576  0.760  1.0
  O  O18  1  0.214  0.429  0.768  1.0
  O  O19  1  0.729  0.076  0.260  1.0
  O  O20  1  0.938  0.729  0.268  1.0
  O  O21  1  0.089  0.929  0.268  1.0
  O  O22  1  0.411  0.794  0.235  1.0
  O  O23  1  0.565  0.433  0.234  1.0
  O  O24  1  0.763  0.583  0.238  1.0
  O  O25  1  0.268  0.933  0.734  1.0
  O  O26  1  0.060  0.294  0.735  1.0
  O  O27  1  0.916  0.083  0.738  1.0
  S  S28  1  0.247  0.960  0.248  1.0
  S  S29  1  0.046  0.460  0.748  1.0
  Si  Si30  1  0.541  0.256  0.250  1.0
  Si  Si31  1  0.958  0.541  0.255  1.0
  Si  Si32  1  0.453  0.756  0.750  1.0
  Si  Si33  1  0.747  0.041  0.755  1.0
  Sn  Sn34  1  0.358  0.362  0.943  1.0
  Sn  Sn35  1  0.837  0.862  0.443  1.0
  Sn  Sn36  1  0.649  0.646  0.058  1.0
  Sn  Sn37  1  0.147  0.146  0.558  1.0
[/CIF]
.