The crystal structure described by Sn8P2O13 crystallizes in the monoclinic C2/m space group. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted pentagonal planar geometry to one O(3), two equivalent O(2), and two equivalent O(8) atoms. In the second Sn site, Sn(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(6), and two equivalent O(8) atoms. In the third Sn site, Sn(3) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(7) atoms. In the fourth Sn site, Sn(4) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(6), and one O(7) atom. In the fifth Sn site, Sn(5) is bonded in a distorted T-shaped geometry to one O(5) and two equivalent O(7) atoms. In the sixth Sn site, Sn(6) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(7) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(5), and two equivalent O(4) atoms. In the second P site, P(2) is bonded in a tetrahedral geometry to two equivalent O(6) and two equivalent O(8) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sn(3) and one P(1) atom. In the second O site, O(2) is bonded to one Sn(1), one Sn(3), one Sn(4), and one Sn(6) atom to form edge-sharing OSn4 tetrahedra. In the third O site, O(3) is bonded to one Sn(1), one Sn(2), and two equivalent Sn(4) atoms to form distorted edge-sharing OSn4 tetrahedra. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Sn(6) and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Sn(5) and one P(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sn(2), one Sn(4), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Sn(3), one Sn(4), one Sn(5), and one Sn(6) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sn(1), one Sn(2), and one P(2) atom. is represented by the CIF file [CIF]
data_Sn8P2O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.319
_cell_length_b   7.319
_cell_length_c   14.341
_cell_angle_alpha   84.257
_cell_angle_beta   84.257
_cell_angle_gamma   88.027
_symmetry_Int_Tables_number   1
_cell_volume   760.226
_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
  Sn  Sn0  1  0.926  0.926  0.694  1.0
  Sn  Sn1  1  0.737  0.737  0.512  1.0
  Sn  Sn2  1  0.672  0.672  0.891  1.0
  Sn  Sn3  1  0.452  0.924  0.706  1.0
  Sn  Sn4  1  0.924  0.452  0.706  1.0
  Sn  Sn5  1  0.574  0.574  0.284  1.0
  Sn  Sn6  1  0.329  0.838  0.096  1.0
  Sn  Sn7  1  0.838  0.329  0.096  1.0
  Sn  Sn8  1  0.671  0.162  0.904  1.0
  Sn  Sn9  1  0.162  0.671  0.904  1.0
  Sn  Sn10  1  0.426  0.426  0.716  1.0
  Sn  Sn11  1  0.548  0.076  0.294  1.0
  Sn  Sn12  1  0.076  0.548  0.294  1.0
  Sn  Sn13  1  0.328  0.328  0.109  1.0
  Sn  Sn14  1  0.263  0.263  0.488  1.0
  Sn  Sn15  1  0.074  0.074  0.306  1.0
  P  P16  1  0.844  0.844  0.099  1.0
  P  P17  1  0.747  0.253  0.500  1.0
  P  P18  1  0.253  0.747  0.500  1.0
  P  P19  1  0.156  0.156  0.901  1.0
  O  O20  1  0.852  0.852  0.990  1.0
  O  O21  1  0.665  0.948  0.809  1.0
  O  O22  1  0.948  0.665  0.809  1.0
  O  O23  1  0.731  0.731  0.662  1.0
  O  O24  1  0.217  0.966  0.865  1.0
  O  O25  1  0.966  0.217  0.865  1.0
  O  O26  1  0.701  0.701  0.144  1.0
  O  O27  1  0.422  0.736  0.560  1.0
  O  O28  1  0.736  0.422  0.560  1.0
  O  O29  1  0.671  0.381  0.787  1.0
  O  O30  1  0.381  0.671  0.787  1.0
  O  O31  1  0.261  0.927  0.433  1.0
  O  O32  1  0.927  0.261  0.433  1.0
  O  O33  1  0.739  0.073  0.567  1.0
  O  O34  1  0.073  0.739  0.567  1.0
  O  O35  1  0.619  0.329  0.213  1.0
  O  O36  1  0.329  0.619  0.213  1.0
  O  O37  1  0.578  0.264  0.440  1.0
  O  O38  1  0.264  0.578  0.440  1.0
  O  O39  1  0.299  0.299  0.856  1.0
  O  O40  1  0.783  0.034  0.135  1.0
  O  O41  1  0.034  0.783  0.135  1.0
  O  O42  1  0.269  0.269  0.338  1.0
  O  O43  1  0.335  0.052  0.191  1.0
  O  O44  1  0.052  0.335  0.191  1.0
  O  O45  1  0.148  0.148  0.010  1.0
[/CIF]
.
The crystal structure described by Sn8P2O13 crystallizes in the monoclinic C2/m space group. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted pentagonal planar geometry to one O(3), two equivalent O(2), and two equivalent O(8) atoms. In the second Sn site, Sn(2) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(6), and two equivalent O(8) atoms. In the third Sn site, Sn(3) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(7) atoms. In the fourth Sn site, Sn(4) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(6), and one O(7) atom. In the fifth Sn site, Sn(5) is bonded in a distorted T-shaped geometry to one O(5) and two equivalent O(7) atoms. In the sixth Sn site, Sn(6) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(7) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(5), and two equivalent O(4) atoms. In the second P site, P(2) is bonded in a tetrahedral geometry to two equivalent O(6) and two equivalent O(8) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sn(3) and one P(1) atom. In the second O site, O(2) is bonded to one Sn(1), one Sn(3), one Sn(4), and one Sn(6) atom to form edge-sharing OSn4 tetrahedra. In the third O site, O(3) is bonded to one Sn(1), one Sn(2), and two equivalent Sn(4) atoms to form distorted edge-sharing OSn4 tetrahedra. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Sn(6) and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Sn(5) and one P(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Sn(2), one Sn(4), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Sn(3), one Sn(4), one Sn(5), and one Sn(6) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sn(1), one Sn(2), and one P(2) atom. is represented by the CIF file [CIF]
data_Sn8P2O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.319
_cell_length_b   7.319
_cell_length_c   14.341
_cell_angle_alpha   84.257
_cell_angle_beta   84.257
_cell_angle_gamma   88.027
_symmetry_Int_Tables_number   1
_cell_volume   760.226
_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
  Sn  Sn0  1  0.926  0.926  0.694  1.0
  Sn  Sn1  1  0.737  0.737  0.512  1.0
  Sn  Sn2  1  0.672  0.672  0.891  1.0
  Sn  Sn3  1  0.452  0.924  0.706  1.0
  Sn  Sn4  1  0.924  0.452  0.706  1.0
  Sn  Sn5  1  0.574  0.574  0.284  1.0
  Sn  Sn6  1  0.329  0.838  0.096  1.0
  Sn  Sn7  1  0.838  0.329  0.096  1.0
  Sn  Sn8  1  0.671  0.162  0.904  1.0
  Sn  Sn9  1  0.162  0.671  0.904  1.0
  Sn  Sn10  1  0.426  0.426  0.716  1.0
  Sn  Sn11  1  0.548  0.076  0.294  1.0
  Sn  Sn12  1  0.076  0.548  0.294  1.0
  Sn  Sn13  1  0.328  0.328  0.109  1.0
  Sn  Sn14  1  0.263  0.263  0.488  1.0
  Sn  Sn15  1  0.074  0.074  0.306  1.0
  P  P16  1  0.844  0.844  0.099  1.0
  P  P17  1  0.747  0.253  0.500  1.0
  P  P18  1  0.253  0.747  0.500  1.0
  P  P19  1  0.156  0.156  0.901  1.0
  O  O20  1  0.852  0.852  0.990  1.0
  O  O21  1  0.665  0.948  0.809  1.0
  O  O22  1  0.948  0.665  0.809  1.0
  O  O23  1  0.731  0.731  0.662  1.0
  O  O24  1  0.217  0.966  0.865  1.0
  O  O25  1  0.966  0.217  0.865  1.0
  O  O26  1  0.701  0.701  0.144  1.0
  O  O27  1  0.422  0.736  0.560  1.0
  O  O28  1  0.736  0.422  0.560  1.0
  O  O29  1  0.671  0.381  0.787  1.0
  O  O30  1  0.381  0.671  0.787  1.0
  O  O31  1  0.261  0.927  0.433  1.0
  O  O32  1  0.927  0.261  0.433  1.0
  O  O33  1  0.739  0.073  0.567  1.0
  O  O34  1  0.073  0.739  0.567  1.0
  O  O35  1  0.619  0.329  0.213  1.0
  O  O36  1  0.329  0.619  0.213  1.0
  O  O37  1  0.578  0.264  0.440  1.0
  O  O38  1  0.264  0.578  0.440  1.0
  O  O39  1  0.299  0.299  0.856  1.0
  O  O40  1  0.783  0.034  0.135  1.0
  O  O41  1  0.034  0.783  0.135  1.0
  O  O42  1  0.269  0.269  0.338  1.0
  O  O43  1  0.335  0.052  0.191  1.0
  O  O44  1  0.052  0.335  0.191  1.0
  O  O45  1  0.148  0.148  0.010  1.0
[/CIF]
.