The crystal structure described by Sn4P2O9 crystallizes in the triclinic P-1 space group. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(8), and one O(9) atom. In the second Sn site, Sn(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(4), and one O(9) atom. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(8), and one O(9) atom. In the fourth Sn site, Sn(4) is bonded in a distorted T-shaped geometry to one O(5), one O(6), 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(2), one O(3), one O(6), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(1), one O(4), one O(5), and one O(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sn(1), one Sn(2), and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sn(3) and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sn(2), one Sn(3), and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Sn(4) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(4) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Sn(4) and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sn(1), one Sn(3), and one P(2) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to one Sn(1), one Sn(2), and one Sn(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sn4P2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.027
_cell_length_b   9.011
_cell_length_c   9.203
_cell_angle_alpha   76.772
_cell_angle_beta   79.596
_cell_angle_gamma   68.381
_symmetry_Int_Tables_number   1
_cell_volume   524.414
_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  0.365  0.755  0.091  1.0
  Sn  Sn1  1  0.880  0.718  0.086  1.0
  Sn  Sn2  1  0.229  0.440  0.355  1.0
  Sn  Sn3  1  0.865  0.982  0.372  1.0
  Sn  Sn4  1  0.135  0.018  0.628  1.0
  Sn  Sn5  1  0.771  0.560  0.645  1.0
  Sn  Sn6  1  0.120  0.282  0.914  1.0
  Sn  Sn7  1  0.635  0.245  0.909  1.0
  P  P8  1  0.385  0.096  0.258  1.0
  P  P9  1  0.755  0.384  0.238  1.0
  P  P10  1  0.245  0.616  0.762  1.0
  P  P11  1  0.615  0.904  0.742  1.0
  O  O12  1  0.823  0.322  0.084  1.0
  O  O13  1  0.337  0.281  0.186  1.0
  O  O14  1  0.276  0.019  0.183  1.0
  O  O15  1  0.896  0.479  0.250  1.0
  O  O16  1  0.762  0.246  0.374  1.0
  O  O17  1  0.626  0.007  0.236  1.0
  O  O18  1  0.313  0.095  0.428  1.0
  O  O19  1  0.526  0.505  0.239  1.0
  O  O20  1  0.114  0.686  0.219  1.0
  O  O21  1  0.886  0.314  0.781  1.0
  O  O22  1  0.474  0.495  0.761  1.0
  O  O23  1  0.687  0.905  0.572  1.0
  O  O24  1  0.374  0.993  0.764  1.0
  O  O25  1  0.238  0.754  0.626  1.0
  O  O26  1  0.104  0.521  0.750  1.0
  O  O27  1  0.724  0.981  0.817  1.0
  O  O28  1  0.663  0.719  0.814  1.0
  O  O29  1  0.177  0.678  0.916  1.0
[/CIF]
.
The crystal structure described by Sn4P2O9 crystallizes in the triclinic P-1 space group. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(8), and one O(9) atom. In the second Sn site, Sn(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(4), and one O(9) atom. In the third Sn site, Sn(3) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(8), and one O(9) atom. In the fourth Sn site, Sn(4) is bonded in a distorted T-shaped geometry to one O(5), one O(6), 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(2), one O(3), one O(6), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(1), one O(4), one O(5), and one O(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sn(1), one Sn(2), and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sn(3) and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sn(2), one Sn(3), and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Sn(4) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(4) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Sn(4) and one P(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sn(1), one Sn(3), and one P(2) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to one Sn(1), one Sn(2), and one Sn(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sn4P2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.027
_cell_length_b   9.011
_cell_length_c   9.203
_cell_angle_alpha   76.772
_cell_angle_beta   79.596
_cell_angle_gamma   68.381
_symmetry_Int_Tables_number   1
_cell_volume   524.414
_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  0.365  0.755  0.091  1.0
  Sn  Sn1  1  0.880  0.718  0.086  1.0
  Sn  Sn2  1  0.229  0.440  0.355  1.0
  Sn  Sn3  1  0.865  0.982  0.372  1.0
  Sn  Sn4  1  0.135  0.018  0.628  1.0
  Sn  Sn5  1  0.771  0.560  0.645  1.0
  Sn  Sn6  1  0.120  0.282  0.914  1.0
  Sn  Sn7  1  0.635  0.245  0.909  1.0
  P  P8  1  0.385  0.096  0.258  1.0
  P  P9  1  0.755  0.384  0.238  1.0
  P  P10  1  0.245  0.616  0.762  1.0
  P  P11  1  0.615  0.904  0.742  1.0
  O  O12  1  0.823  0.322  0.084  1.0
  O  O13  1  0.337  0.281  0.186  1.0
  O  O14  1  0.276  0.019  0.183  1.0
  O  O15  1  0.896  0.479  0.250  1.0
  O  O16  1  0.762  0.246  0.374  1.0
  O  O17  1  0.626  0.007  0.236  1.0
  O  O18  1  0.313  0.095  0.428  1.0
  O  O19  1  0.526  0.505  0.239  1.0
  O  O20  1  0.114  0.686  0.219  1.0
  O  O21  1  0.886  0.314  0.781  1.0
  O  O22  1  0.474  0.495  0.761  1.0
  O  O23  1  0.687  0.905  0.572  1.0
  O  O24  1  0.374  0.993  0.764  1.0
  O  O25  1  0.238  0.754  0.626  1.0
  O  O26  1  0.104  0.521  0.750  1.0
  O  O27  1  0.724  0.981  0.817  1.0
  O  O28  1  0.663  0.719  0.814  1.0
  O  O29  1  0.177  0.678  0.916  1.0
[/CIF]
.