The crystal structure described by Na3AlSnSi(PO6)2 crystallizes in the monoclinic Cc space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate 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 8-coordinate geometry to one O(10), one O(11), one O(2), one O(5), one O(6), one O(7), and two equivalent O(4) atoms. Al(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 AlO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. Sn(1) 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 P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. Si(1) 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 Al(1)O6 octahedra and corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-39°. There are two inequivalent P sites. In the first P site, 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 Al(1)O6 octahedra and corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-43°. In the second P site, P(2) is bonded to one O(2), one O(5), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Al(1)O6 octahedra and corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-36°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Al(1), and one Si(1) atom to form distorted corner-sharing ONa2AlSi trigonal pyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Sn(1), and one P(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Na(3), one Al(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(3), one Al(1), and one P(2) atom. In the sixth O site, O(6) is bonded to one Na(1), one Na(3), one Sn(1), and one Si(1) atom to form distorted corner-sharing ONa2SiSn trigonal pyramids. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(2), one Na(3), one Sn(1), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one Na(2), one Al(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 Al(1), and one P(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Na(2), one Na(3), one Sn(1), and one Si(1) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Al(1), and one P(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(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na3AlSiSn(PO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.823
_cell_length_b   8.839
_cell_length_c   8.886
_cell_angle_alpha   119.741
_cell_angle_beta   90.000
_cell_angle_gamma   119.938
_symmetry_Int_Tables_number   1
_cell_volume   492.388
_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
  Al  Al0  1  0.154  0.789  0.436  1.0
  Al  Al1  1  0.635  0.789  0.936  1.0
  Na  Na2  1  0.026  0.498  0.004  1.0
  Na  Na3  1  0.472  0.498  0.504  1.0
  Na  Na4  1  0.386  0.992  0.239  1.0
  Na  Na5  1  0.605  0.992  0.739  1.0
  Na  Na6  1  0.884  0.629  0.724  1.0
  Na  Na7  1  0.744  0.629  0.224  1.0
  O  O8  1  0.273  0.712  0.267  1.0
  O  O9  1  0.591  0.309  0.234  1.0
  O  O10  1  0.718  0.309  0.734  1.0
  O  O11  1  0.440  0.712  0.767  1.0
  O  O12  1  0.021  0.136  0.421  1.0
  O  O13  1  0.875  0.865  0.071  1.0
  O  O14  1  0.990  0.865  0.571  1.0
  O  O15  1  0.115  0.136  0.921  1.0
  O  O16  1  0.926  0.496  0.262  1.0
  O  O17  1  0.438  0.510  0.239  1.0
  O  O18  1  0.072  0.510  0.739  1.0
  O  O19  1  0.570  0.496  0.762  1.0
  O  O20  1  0.786  0.302  0.417  1.0
  O  O21  1  0.516  0.735  0.087  1.0
  O  O22  1  0.219  0.735  0.587  1.0
  O  O23  1  0.516  0.302  0.917  1.0
  O  O24  1  0.723  0.091  0.069  1.0
  O  O25  1  0.629  0.912  0.443  1.0
  O  O26  1  0.283  0.912  0.943  1.0
  O  O27  1  0.368  0.091  0.569  1.0
  O  O28  1  0.056  0.832  0.256  1.0
  O  O29  1  0.231  0.152  0.245  1.0
  O  O30  1  0.921  0.152  0.745  1.0
  O  O31  1  0.776  0.832  0.756  1.0
  P  P32  1  0.040  0.992  0.242  1.0
  P  P33  1  0.952  0.992  0.742  1.0
  P  P34  1  0.761  0.295  0.239  1.0
  P  P35  1  0.534  0.295  0.739  1.0
  Si  Si36  1  0.455  0.710  0.249  1.0
  Si  Si37  1  0.255  0.710  0.749  1.0
  Sn  Sn38  1  0.345  0.204  0.055  1.0
  Sn  Sn39  1  0.858  0.204  0.555  1.0
[/CIF]
.
The crystal structure described by Na3AlSnSi(PO6)2 crystallizes in the monoclinic Cc space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate 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 8-coordinate geometry to one O(10), one O(11), one O(2), one O(5), one O(6), one O(7), and two equivalent O(4) atoms. Al(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 AlO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. Sn(1) 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 P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. Si(1) 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 Al(1)O6 octahedra and corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-39°. There are two inequivalent P sites. In the first P site, 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 Al(1)O6 octahedra and corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-43°. In the second P site, P(2) is bonded to one O(2), one O(5), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Al(1)O6 octahedra and corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-36°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Na(1), one Na(2), one Al(1), and one Si(1) atom to form distorted corner-sharing ONa2AlSi trigonal pyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Sn(1), and one P(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent Na(3), one Al(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(3), one Al(1), and one P(2) atom. In the sixth O site, O(6) is bonded to one Na(1), one Na(3), one Sn(1), and one Si(1) atom to form distorted corner-sharing ONa2SiSn trigonal pyramids. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(2), one Na(3), one Sn(1), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one Na(2), one Al(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 Al(1), and one P(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Na(2), one Na(3), one Sn(1), and one Si(1) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Na(1), one Na(2), one Na(3), one Al(1), and one P(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(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na3AlSiSn(PO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.823
_cell_length_b   8.839
_cell_length_c   8.886
_cell_angle_alpha   119.741
_cell_angle_beta   90.000
_cell_angle_gamma   119.938
_symmetry_Int_Tables_number   1
_cell_volume   492.388
_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
  Al  Al0  1  0.154  0.789  0.436  1.0
  Al  Al1  1  0.635  0.789  0.936  1.0
  Na  Na2  1  0.026  0.498  0.004  1.0
  Na  Na3  1  0.472  0.498  0.504  1.0
  Na  Na4  1  0.386  0.992  0.239  1.0
  Na  Na5  1  0.605  0.992  0.739  1.0
  Na  Na6  1  0.884  0.629  0.724  1.0
  Na  Na7  1  0.744  0.629  0.224  1.0
  O  O8  1  0.273  0.712  0.267  1.0
  O  O9  1  0.591  0.309  0.234  1.0
  O  O10  1  0.718  0.309  0.734  1.0
  O  O11  1  0.440  0.712  0.767  1.0
  O  O12  1  0.021  0.136  0.421  1.0
  O  O13  1  0.875  0.865  0.071  1.0
  O  O14  1  0.990  0.865  0.571  1.0
  O  O15  1  0.115  0.136  0.921  1.0
  O  O16  1  0.926  0.496  0.262  1.0
  O  O17  1  0.438  0.510  0.239  1.0
  O  O18  1  0.072  0.510  0.739  1.0
  O  O19  1  0.570  0.496  0.762  1.0
  O  O20  1  0.786  0.302  0.417  1.0
  O  O21  1  0.516  0.735  0.087  1.0
  O  O22  1  0.219  0.735  0.587  1.0
  O  O23  1  0.516  0.302  0.917  1.0
  O  O24  1  0.723  0.091  0.069  1.0
  O  O25  1  0.629  0.912  0.443  1.0
  O  O26  1  0.283  0.912  0.943  1.0
  O  O27  1  0.368  0.091  0.569  1.0
  O  O28  1  0.056  0.832  0.256  1.0
  O  O29  1  0.231  0.152  0.245  1.0
  O  O30  1  0.921  0.152  0.745  1.0
  O  O31  1  0.776  0.832  0.756  1.0
  P  P32  1  0.040  0.992  0.242  1.0
  P  P33  1  0.952  0.992  0.742  1.0
  P  P34  1  0.761  0.295  0.239  1.0
  P  P35  1  0.534  0.295  0.739  1.0
  Si  Si36  1  0.455  0.710  0.249  1.0
  Si  Si37  1  0.255  0.710  0.749  1.0
  Sn  Sn38  1  0.345  0.204  0.055  1.0
  Sn  Sn39  1  0.858  0.204  0.555  1.0
[/CIF]
.