The material described by Na3Ge2Si2PO12 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 8-coordinate geometry to one O(1), one O(12), one O(5), one O(6), one O(8), one O(9), and two equivalent O(3) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(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 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 P(1)O4 tetrahedra. In the second Ge site, Ge(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 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 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-39°. 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-38°. 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-38°. 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 Ge(1), and one Si(2) atom to form distorted ONa3SiGe trigonal bipyramids that share corners with three equivalent O(12)Na3GeP trigonal bipyramids and corners with two equivalent O(2)Na2SiGe trigonal pyramids. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Ge(2), and one Si(1) atom to form distorted ONa2SiGe trigonal pyramids that share corners with two equivalent O(1)Na3SiGe trigonal bipyramids and  a faceface with one O(12)Na3GeP trigonal bipyramid. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Na(3), one Ge(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Ge(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 Ge(1), and one Si(1) atom. 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 Ge(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Na(2), one Ge(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Ge(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Ge(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 Ge(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 Ge(1), and one P(1) atom. In the twelfth O site, O(12) is bonded to one Na(1), one Na(2), one Na(3), one Ge(2), and one P(1) atom to form distorted ONa3GeP trigonal bipyramids that share corners with three equivalent O(1)Na3SiGe trigonal bipyramids and  a faceface with one O(2)Na2SiGe trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na3Si2Ge2PO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.681
_cell_length_b   8.699
_cell_length_c   8.725
_cell_angle_alpha   61.294
_cell_angle_beta   60.169
_cell_angle_gamma   60.067
_symmetry_Int_Tables_number   1
_cell_volume   471.116
_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  0.357  0.351  0.440  1.0
  Ge  Ge1  1  0.156  0.150  0.061  1.0
  Ge  Ge2  1  0.633  0.650  0.561  1.0
  Ge  Ge3  1  0.853  0.851  0.940  1.0
  Na  Na4  1  0.478  0.502  0.002  1.0
  Na  Na5  1  0.018  0.002  0.502  1.0
  Na  Na6  1  0.382  0.746  0.249  1.0
  Na  Na7  1  0.623  0.246  0.749  1.0
  Na  Na8  1  0.877  0.612  0.762  1.0
  Na  Na9  1  0.749  0.112  0.262  1.0
  O  O10  1  0.570  0.436  0.267  1.0
  O  O11  1  0.274  0.055  0.235  1.0
  O  O12  1  0.436  0.555  0.735  1.0
  O  O13  1  0.727  0.936  0.767  1.0
  O  O14  1  0.865  0.708  0.436  1.0
  O  O15  1  0.005  0.780  0.079  1.0
  O  O16  1  0.136  0.280  0.579  1.0
  O  O17  1  0.992  0.208  0.936  1.0
  O  O18  1  0.439  0.226  0.272  1.0
  O  O19  1  0.934  0.263  0.230  1.0
  O  O20  1  0.573  0.763  0.730  1.0
  O  O21  1  0.063  0.726  0.772  1.0
  O  O22  1  0.498  0.849  0.419  1.0
  O  O23  1  0.771  0.646  0.074  1.0
  O  O24  1  0.509  0.146  0.574  1.0
  O  O25  1  0.235  0.349  0.919  1.0
  O  O26  1  0.650  0.023  0.060  1.0
  O  O27  1  0.728  0.475  0.444  1.0
  O  O28  1  0.352  0.975  0.944  1.0
  O  O29  1  0.267  0.523  0.560  1.0
  O  O30  1  0.221  0.570  0.261  1.0
  O  O31  1  0.056  0.910  0.252  1.0
  O  O32  1  0.783  0.410  0.752  1.0
  O  O33  1  0.948  0.070  0.761  1.0
  P  P34  1  0.035  0.740  0.256  1.0
  P  P35  1  0.969  0.240  0.756  1.0
  Si  Si36  1  0.462  0.040  0.248  1.0
  Si  Si37  1  0.757  0.457  0.253  1.0
  Si  Si38  1  0.532  0.957  0.753  1.0
  Si  Si39  1  0.250  0.540  0.748  1.0
[/CIF]
.
The material described by Na3Ge2Si2PO12 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 8-coordinate geometry to one O(1), one O(12), one O(5), one O(6), one O(8), one O(9), and two equivalent O(3) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(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 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 P(1)O4 tetrahedra. In the second Ge site, Ge(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 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 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-39°. 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-38°. 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 Ge(1)O6 octahedra and corners with two equivalent Ge(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-38°. 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 Ge(1), and one Si(2) atom to form distorted ONa3SiGe trigonal bipyramids that share corners with three equivalent O(12)Na3GeP trigonal bipyramids and corners with two equivalent O(2)Na2SiGe trigonal pyramids. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Ge(2), and one Si(1) atom to form distorted ONa2SiGe trigonal pyramids that share corners with two equivalent O(1)Na3SiGe trigonal bipyramids and  a faceface with one O(12)Na3GeP trigonal bipyramid. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Na(3), one Ge(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Ge(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 Ge(1), and one Si(1) atom. 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 Ge(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Na(2), one Ge(2), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Ge(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Ge(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 Ge(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 Ge(1), and one P(1) atom. In the twelfth O site, O(12) is bonded to one Na(1), one Na(2), one Na(3), one Ge(2), and one P(1) atom to form distorted ONa3GeP trigonal bipyramids that share corners with three equivalent O(1)Na3SiGe trigonal bipyramids and  a faceface with one O(2)Na2SiGe trigonal pyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na3Si2Ge2PO12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.681
_cell_length_b   8.699
_cell_length_c   8.725
_cell_angle_alpha   61.294
_cell_angle_beta   60.169
_cell_angle_gamma   60.067
_symmetry_Int_Tables_number   1
_cell_volume   471.116
_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  0.357  0.351  0.440  1.0
  Ge  Ge1  1  0.156  0.150  0.061  1.0
  Ge  Ge2  1  0.633  0.650  0.561  1.0
  Ge  Ge3  1  0.853  0.851  0.940  1.0
  Na  Na4  1  0.478  0.502  0.002  1.0
  Na  Na5  1  0.018  0.002  0.502  1.0
  Na  Na6  1  0.382  0.746  0.249  1.0
  Na  Na7  1  0.623  0.246  0.749  1.0
  Na  Na8  1  0.877  0.612  0.762  1.0
  Na  Na9  1  0.749  0.112  0.262  1.0
  O  O10  1  0.570  0.436  0.267  1.0
  O  O11  1  0.274  0.055  0.235  1.0
  O  O12  1  0.436  0.555  0.735  1.0
  O  O13  1  0.727  0.936  0.767  1.0
  O  O14  1  0.865  0.708  0.436  1.0
  O  O15  1  0.005  0.780  0.079  1.0
  O  O16  1  0.136  0.280  0.579  1.0
  O  O17  1  0.992  0.208  0.936  1.0
  O  O18  1  0.439  0.226  0.272  1.0
  O  O19  1  0.934  0.263  0.230  1.0
  O  O20  1  0.573  0.763  0.730  1.0
  O  O21  1  0.063  0.726  0.772  1.0
  O  O22  1  0.498  0.849  0.419  1.0
  O  O23  1  0.771  0.646  0.074  1.0
  O  O24  1  0.509  0.146  0.574  1.0
  O  O25  1  0.235  0.349  0.919  1.0
  O  O26  1  0.650  0.023  0.060  1.0
  O  O27  1  0.728  0.475  0.444  1.0
  O  O28  1  0.352  0.975  0.944  1.0
  O  O29  1  0.267  0.523  0.560  1.0
  O  O30  1  0.221  0.570  0.261  1.0
  O  O31  1  0.056  0.910  0.252  1.0
  O  O32  1  0.783  0.410  0.752  1.0
  O  O33  1  0.948  0.070  0.761  1.0
  P  P34  1  0.035  0.740  0.256  1.0
  P  P35  1  0.969  0.240  0.756  1.0
  Si  Si36  1  0.462  0.040  0.248  1.0
  Si  Si37  1  0.757  0.457  0.253  1.0
  Si  Si38  1  0.532  0.957  0.753  1.0
  Si  Si39  1  0.250  0.540  0.748  1.0
[/CIF]
.