The crystal structure described by P4SeO7 is Indium-like structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two P4SeO7 clusters. There are four inequivalent P sites. In the first P site, P(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(3), and one O(7) atom. In the second P site, P(2) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one Se(1), one O(1), one O(3), and one O(6) atom to form distorted corner-sharing PSeO3 tetrahedra. In the fourth P site, P(4) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(7) atom. Se(1) is bonded in a single-bond geometry to one P(3) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one P(2) and one P(4) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(4) atom. is represented by the CIF file [CIF]
data_P4SeO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.210
_cell_length_b   7.443
_cell_length_c   8.693
_cell_angle_alpha   93.865
_cell_angle_beta   103.887
_cell_angle_gamma   95.234
_symmetry_Int_Tables_number   1
_cell_volume   449.020
_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
  P  P0  1  0.393  0.731  0.232  1.0
  P  P1  1  0.607  0.269  0.768  1.0
  P  P2  1  0.707  0.017  0.356  1.0
  P  P3  1  0.293  0.983  0.644  1.0
  P  P4  1  0.739  0.757  0.109  1.0
  P  P5  1  0.261  0.243  0.891  1.0
  P  P6  1  0.768  0.649  0.432  1.0
  P  P7  1  0.232  0.351  0.568  1.0
  Se  Se8  1  0.843  0.723  0.912  1.0
  Se  Se9  1  0.157  0.277  0.088  1.0
  O  O10  1  0.778  0.965  0.197  1.0
  O  O11  1  0.222  0.035  0.803  1.0
  O  O12  1  0.483  0.947  0.306  1.0
  O  O13  1  0.517  0.053  0.694  1.0
  O  O14  1  0.509  0.714  0.085  1.0
  O  O15  1  0.491  0.286  0.915  1.0
  O  O16  1  0.755  0.208  0.417  1.0
  O  O17  1  0.245  0.792  0.583  1.0
  O  O18  1  0.800  0.877  0.476  1.0
  O  O19  1  0.200  0.123  0.524  1.0
  O  O20  1  0.172  0.358  0.744  1.0
  O  O21  1  0.828  0.642  0.256  1.0
  O  O22  1  0.469  0.378  0.634  1.0
  O  O23  1  0.531  0.622  0.366  1.0
[/CIF]
.
The crystal structure described by P4SeO7 is Indium-like structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two P4SeO7 clusters. There are four inequivalent P sites. In the first P site, P(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2), one O(3), and one O(7) atom. In the second P site, P(2) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form corner-sharing PO4 tetrahedra. In the third P site, P(3) is bonded to one Se(1), one O(1), one O(3), and one O(6) atom to form distorted corner-sharing PSeO3 tetrahedra. In the fourth P site, P(4) is bonded in a distorted trigonal non-coplanar geometry to one O(5), one O(6), and one O(7) atom. Se(1) is bonded in a single-bond geometry to one P(3) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one P(2) and one P(4) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(4) atom. is represented by the CIF file [CIF]
data_P4SeO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.210
_cell_length_b   7.443
_cell_length_c   8.693
_cell_angle_alpha   93.865
_cell_angle_beta   103.887
_cell_angle_gamma   95.234
_symmetry_Int_Tables_number   1
_cell_volume   449.020
_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
  P  P0  1  0.393  0.731  0.232  1.0
  P  P1  1  0.607  0.269  0.768  1.0
  P  P2  1  0.707  0.017  0.356  1.0
  P  P3  1  0.293  0.983  0.644  1.0
  P  P4  1  0.739  0.757  0.109  1.0
  P  P5  1  0.261  0.243  0.891  1.0
  P  P6  1  0.768  0.649  0.432  1.0
  P  P7  1  0.232  0.351  0.568  1.0
  Se  Se8  1  0.843  0.723  0.912  1.0
  Se  Se9  1  0.157  0.277  0.088  1.0
  O  O10  1  0.778  0.965  0.197  1.0
  O  O11  1  0.222  0.035  0.803  1.0
  O  O12  1  0.483  0.947  0.306  1.0
  O  O13  1  0.517  0.053  0.694  1.0
  O  O14  1  0.509  0.714  0.085  1.0
  O  O15  1  0.491  0.286  0.915  1.0
  O  O16  1  0.755  0.208  0.417  1.0
  O  O17  1  0.245  0.792  0.583  1.0
  O  O18  1  0.800  0.877  0.476  1.0
  O  O19  1  0.200  0.123  0.524  1.0
  O  O20  1  0.172  0.358  0.744  1.0
  O  O21  1  0.828  0.642  0.256  1.0
  O  O22  1  0.469  0.378  0.634  1.0
  O  O23  1  0.531  0.622  0.366  1.0
[/CIF]
.