The structure described by Na3Sn2Si2PO12 crystallizes in the monoclinic Cc space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted hexagonal planar geometry to one O(1), one O(11), one O(12), one O(2), one O(5), and one O(6) atom. In the second Na site, Na(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(2), one O(7), one O(8), and one O(9) atom. In the third Na site, Na(3) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(5), one O(6), one O(8), and two equivalent O(3) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(11), one O(4), one O(5), 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 P(1)O4 tetrahedra. In the second Sn site, Sn(2) is bonded to one O(10), one O(12), one O(2), one O(3), one O(6), and one O(7) 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 P(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(5), one O(7), and one O(9) 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 18-42°. In the second Si site, Si(2) is bonded to one O(1), one O(10), one O(6), 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 27-41°. P(1) is bonded to one O(11), one O(12), one O(3), and one O(4) atom to form PO4 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 26-39°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Na(3), one Sn(1), and one Si(2) atom to form distorted face-sharing ONa3SiSn trigonal bipyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(2), one Sn(2), and one Si(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Na(3), one Sn(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(3), one Sn(1), and one Si(1) atom to form distorted face-sharing ONa2SiSn trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(3), one Sn(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Na(2), one Sn(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(2), one Na(3), one Sn(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(2), one Sn(1), and one Si(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Na(2), one Sn(2), and one Si(2) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Sn(1), and one P(1) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Sn(2), and one P(1) atom. is represented by the CIF card [CIF]
data_Na3Si2Sn2PO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.042
_cell_length_b   9.042
_cell_length_c   9.081
_cell_angle_alpha   90.307
_cell_angle_beta   119.689
_cell_angle_gamma   119.813
_symmetry_Int_Tables_number   1
_cell_volume   527.554
_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  0.980  0.473  0.996  1.0
  Na  Na1  1  0.023  0.016  0.496  1.0
  Na  Na2  1  0.140  0.394  0.750  1.0
  Na  Na3  1  0.856  0.610  0.250  1.0
  Na  Na4  1  0.472  0.874  0.214  1.0
  Na  Na5  1  0.840  0.742  0.714  1.0
  O  O6  1  0.013  0.575  0.743  1.0
  O  O7  1  0.326  0.275  0.754  1.0
  O  O8  1  0.979  0.429  0.254  1.0
  O  O9  1  0.669  0.730  0.243  1.0
  O  O10  1  0.591  0.882  0.574  1.0
  O  O11  1  0.798  0.011  0.918  1.0
  O  O12  1  0.407  0.120  0.418  1.0
  O  O13  1  0.192  0.983  0.074  1.0
  O  O14  1  0.666  0.434  0.740  1.0
  O  O15  1  0.166  0.914  0.756  1.0
  O  O16  1  0.342  0.591  0.256  1.0
  O  O17  1  0.805  0.074  0.240  1.0
  O  O18  1  0.372  0.505  0.587  1.0
  O  O19  1  0.410  0.785  0.923  1.0
  O  O20  1  0.638  0.513  0.423  1.0
  O  O21  1  0.582  0.215  0.087  1.0
  O  O22  1  0.662  0.630  0.942  1.0
  O  O23  1  0.186  0.720  0.559  1.0
  O  O24  1  0.340  0.374  0.059  1.0
  O  O25  1  0.812  0.280  0.442  1.0
  O  O26  1  0.811  0.224  0.745  1.0
  O  O27  1  0.972  0.060  0.755  1.0
  O  O28  1  0.194  0.783  0.255  1.0
  O  O29  1  0.021  0.935  0.245  1.0
  P  P30  1  0.788  0.043  0.749  1.0
  P  P31  1  0.205  0.961  0.249  1.0
  Si  Si32  1  0.505  0.458  0.754  1.0
  Si  Si33  1  0.202  0.754  0.745  1.0
  Si  Si34  1  0.491  0.544  0.245  1.0
  Si  Si35  1  0.796  0.249  0.254  1.0
  Sn  Sn36  1  0.705  0.353  0.559  1.0
  Sn  Sn37  1  0.294  0.152  0.936  1.0
  Sn  Sn38  1  0.285  0.642  0.436  1.0
  Sn  Sn39  1  0.706  0.854  0.059  1.0
[/CIF]
.
The structure described by Na3Sn2Si2PO12 crystallizes in the monoclinic Cc space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted hexagonal planar geometry to one O(1), one O(11), one O(12), one O(2), one O(5), and one O(6) atom. In the second Na site, Na(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(2), one O(7), one O(8), and one O(9) atom. In the third Na site, Na(3) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(5), one O(6), one O(8), and two equivalent O(3) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(11), one O(4), one O(5), 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 P(1)O4 tetrahedra. In the second Sn site, Sn(2) is bonded to one O(10), one O(12), one O(2), one O(3), one O(6), and one O(7) 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 P(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(5), one O(7), and one O(9) 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 18-42°. In the second Si site, Si(2) is bonded to one O(1), one O(10), one O(6), 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 27-41°. P(1) is bonded to one O(11), one O(12), one O(3), and one O(4) atom to form PO4 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 26-39°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Na(3), one Sn(1), and one Si(2) atom to form distorted face-sharing ONa3SiSn trigonal bipyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Na(1), one Na(2), one Sn(2), and one Si(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Na(3), one Sn(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(3), one Sn(1), and one Si(1) atom to form distorted face-sharing ONa2SiSn trigonal pyramids. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(3), one Sn(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Na(2), one Sn(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(2), one Na(3), one Sn(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(2), one Sn(1), and one Si(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Na(2), one Sn(2), and one Si(2) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(2), one Sn(1), and one P(1) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Sn(2), and one P(1) atom. is represented by the CIF card [CIF]
data_Na3Si2Sn2PO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.042
_cell_length_b   9.042
_cell_length_c   9.081
_cell_angle_alpha   90.307
_cell_angle_beta   119.689
_cell_angle_gamma   119.813
_symmetry_Int_Tables_number   1
_cell_volume   527.554
_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  0.980  0.473  0.996  1.0
  Na  Na1  1  0.023  0.016  0.496  1.0
  Na  Na2  1  0.140  0.394  0.750  1.0
  Na  Na3  1  0.856  0.610  0.250  1.0
  Na  Na4  1  0.472  0.874  0.214  1.0
  Na  Na5  1  0.840  0.742  0.714  1.0
  O  O6  1  0.013  0.575  0.743  1.0
  O  O7  1  0.326  0.275  0.754  1.0
  O  O8  1  0.979  0.429  0.254  1.0
  O  O9  1  0.669  0.730  0.243  1.0
  O  O10  1  0.591  0.882  0.574  1.0
  O  O11  1  0.798  0.011  0.918  1.0
  O  O12  1  0.407  0.120  0.418  1.0
  O  O13  1  0.192  0.983  0.074  1.0
  O  O14  1  0.666  0.434  0.740  1.0
  O  O15  1  0.166  0.914  0.756  1.0
  O  O16  1  0.342  0.591  0.256  1.0
  O  O17  1  0.805  0.074  0.240  1.0
  O  O18  1  0.372  0.505  0.587  1.0
  O  O19  1  0.410  0.785  0.923  1.0
  O  O20  1  0.638  0.513  0.423  1.0
  O  O21  1  0.582  0.215  0.087  1.0
  O  O22  1  0.662  0.630  0.942  1.0
  O  O23  1  0.186  0.720  0.559  1.0
  O  O24  1  0.340  0.374  0.059  1.0
  O  O25  1  0.812  0.280  0.442  1.0
  O  O26  1  0.811  0.224  0.745  1.0
  O  O27  1  0.972  0.060  0.755  1.0
  O  O28  1  0.194  0.783  0.255  1.0
  O  O29  1  0.021  0.935  0.245  1.0
  P  P30  1  0.788  0.043  0.749  1.0
  P  P31  1  0.205  0.961  0.249  1.0
  Si  Si32  1  0.505  0.458  0.754  1.0
  Si  Si33  1  0.202  0.754  0.745  1.0
  Si  Si34  1  0.491  0.544  0.245  1.0
  Si  Si35  1  0.796  0.249  0.254  1.0
  Sn  Sn36  1  0.705  0.353  0.559  1.0
  Sn  Sn37  1  0.294  0.152  0.936  1.0
  Sn  Sn38  1  0.285  0.642  0.436  1.0
  Sn  Sn39  1  0.706  0.854  0.059  1.0
[/CIF]
.