The structure described by Na2Ge2Si2SO12 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 Ge sites. In the first Ge site, Ge(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 distorted GeO6 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 Ge site, Ge(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 GeO6 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-40°. 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-36°. 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-35°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(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 Ge(1), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ge(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 Ge(2), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ge(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 Ge(2), and one S(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal pyramidal geometry to one Na(1), one Na(2), one Ge(1), and one Si(2) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Ge(1), and one Si(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(2), one Ge(1), and one S(1) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Ge(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 Ge(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 Ge(2), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Si2Ge2SO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.594
_cell_length_b   8.594
_cell_length_c   8.797
_cell_angle_alpha   90.170
_cell_angle_beta   119.144
_cell_angle_gamma   119.897
_symmetry_Int_Tables_number   1
_cell_volume   465.329
_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
  Ge  Ge0  1  0.306  0.671  0.937  1.0
  Ge  Ge1  1  0.266  0.131  0.437  1.0
  Ge  Ge2  1  0.710  0.355  0.061  1.0
  Ge  Ge3  1  0.706  0.850  0.561  1.0
  Na  Na4  1  0.863  0.749  0.241  1.0
  Na  Na5  1  0.492  0.878  0.741  1.0
  Na  Na6  1  0.001  0.486  0.499  1.0
  Na  Na7  1  0.013  0.998  0.999  1.0
  O  O8  1  0.353  0.481  0.083  1.0
  O  O9  1  0.593  0.855  0.068  1.0
  O  O10  1  0.220  0.720  0.070  1.0
  O  O11  1  0.213  0.974  0.568  1.0
  O  O12  1  0.602  0.230  0.583  1.0
  O  O13  1  0.350  0.350  0.570  1.0
  O  O14  1  0.664  0.517  0.940  1.0
  O  O15  1  0.424  0.151  0.929  1.0
  O  O16  1  0.788  0.272  0.916  1.0
  O  O17  1  0.778  0.005  0.429  1.0
  O  O18  1  0.424  0.777  0.440  1.0
  O  O19  1  0.644  0.628  0.416  1.0
  O  O20  1  0.331  0.559  0.773  1.0
  O  O21  1  0.201  0.773  0.765  1.0
  O  O22  1  0.985  0.420  0.769  1.0
  O  O23  1  0.993  0.064  0.265  1.0
  O  O24  1  0.214  0.942  0.273  1.0
  O  O25  1  0.349  0.284  0.269  1.0
  O  O26  1  0.653  0.441  0.238  1.0
  O  O27  1  0.790  0.234  0.227  1.0
  O  O28  1  1.000  0.574  0.231  1.0
  O  O29  1  0.993  0.937  0.727  1.0
  O  O30  1  0.797  0.085  0.738  1.0
  O  O31  1  0.657  0.731  0.731  1.0
  S  S32  1  0.493  0.457  0.249  1.0
  S  S33  1  0.792  0.256  0.749  1.0
  Si  Si34  1  0.785  0.045  0.252  1.0
  Si  Si35  1  0.220  0.753  0.252  1.0
  Si  Si36  1  0.207  0.967  0.752  1.0
  Si  Si37  1  0.499  0.532  0.752  1.0
[/CIF]
.
The structure described by Na2Ge2Si2SO12 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 Ge sites. In the first Ge site, Ge(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 distorted GeO6 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 Ge site, Ge(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 GeO6 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-40°. 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-36°. 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-35°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(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 Ge(1), and one Si(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ge(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 Ge(2), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ge(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 Ge(2), and one S(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal pyramidal geometry to one Na(1), one Na(2), one Ge(1), and one Si(2) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Ge(1), and one Si(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(2), one Ge(1), and one S(1) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Ge(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 Ge(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 Ge(2), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Si2Ge2SO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.594
_cell_length_b   8.594
_cell_length_c   8.797
_cell_angle_alpha   90.170
_cell_angle_beta   119.144
_cell_angle_gamma   119.897
_symmetry_Int_Tables_number   1
_cell_volume   465.329
_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
  Ge  Ge0  1  0.306  0.671  0.937  1.0
  Ge  Ge1  1  0.266  0.131  0.437  1.0
  Ge  Ge2  1  0.710  0.355  0.061  1.0
  Ge  Ge3  1  0.706  0.850  0.561  1.0
  Na  Na4  1  0.863  0.749  0.241  1.0
  Na  Na5  1  0.492  0.878  0.741  1.0
  Na  Na6  1  0.001  0.486  0.499  1.0
  Na  Na7  1  0.013  0.998  0.999  1.0
  O  O8  1  0.353  0.481  0.083  1.0
  O  O9  1  0.593  0.855  0.068  1.0
  O  O10  1  0.220  0.720  0.070  1.0
  O  O11  1  0.213  0.974  0.568  1.0
  O  O12  1  0.602  0.230  0.583  1.0
  O  O13  1  0.350  0.350  0.570  1.0
  O  O14  1  0.664  0.517  0.940  1.0
  O  O15  1  0.424  0.151  0.929  1.0
  O  O16  1  0.788  0.272  0.916  1.0
  O  O17  1  0.778  0.005  0.429  1.0
  O  O18  1  0.424  0.777  0.440  1.0
  O  O19  1  0.644  0.628  0.416  1.0
  O  O20  1  0.331  0.559  0.773  1.0
  O  O21  1  0.201  0.773  0.765  1.0
  O  O22  1  0.985  0.420  0.769  1.0
  O  O23  1  0.993  0.064  0.265  1.0
  O  O24  1  0.214  0.942  0.273  1.0
  O  O25  1  0.349  0.284  0.269  1.0
  O  O26  1  0.653  0.441  0.238  1.0
  O  O27  1  0.790  0.234  0.227  1.0
  O  O28  1  1.000  0.574  0.231  1.0
  O  O29  1  0.993  0.937  0.727  1.0
  O  O30  1  0.797  0.085  0.738  1.0
  O  O31  1  0.657  0.731  0.731  1.0
  S  S32  1  0.493  0.457  0.249  1.0
  S  S33  1  0.792  0.256  0.749  1.0
  Si  Si34  1  0.785  0.045  0.252  1.0
  Si  Si35  1  0.220  0.753  0.252  1.0
  Si  Si36  1  0.207  0.967  0.752  1.0
  Si  Si37  1  0.499  0.532  0.752  1.0
[/CIF]
.