The compound described by VO(PO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(10), one O(13), one O(23), one O(27), one O(6), and one O(8) atom to form VO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second V site, V(2) is bonded to one O(11), one O(15), one O(22), one O(25), one O(26), and one O(4) atom to form VO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the third V site, V(3) is bonded in a 6-coordinate geometry to one O(12), one O(21), one O(24), one O(27), one O(7), and one O(9) atom. In the fourth V site, V(4) is bonded in a 6-coordinate geometry to one O(14), one O(18), one O(19), one O(28), one O(4), and one O(5) atom. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(20), one O(24), one O(3), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. In the second P site, P(2) is bonded to one O(12), one O(18), one O(20), and one O(22) atom to form PO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. In the third P site, P(3) is bonded to one O(11), one O(14), one O(16), and one O(25) atom to form PO4 tetrahedra that share corners with two equivalent V(2)O6 octahedra and  a cornercorner with one P(8)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-41°. In the fourth P site, P(4) is bonded to one O(1), one O(13), one O(21), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent V(1)O6 octahedra and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 30-41°. In the fifth P site, P(5) is bonded to one O(15), one O(17), one O(2), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra and  a cornercorner with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. In the sixth P site, P(6) is bonded to one O(1), one O(10), one O(19), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-45°. In the seventh P site, P(7) is bonded to one O(2), one O(23), one O(28), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. In the eighth P site, P(8) is bonded to one O(16), one O(26), one O(27), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-45°. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one P(4) and one P(6) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one P(5) and one P(7) atom. In the third O site, O(3) is bonded in a single-bond geometry to one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one V(2), one V(4), and one P(6) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one V(4) and one P(5) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one V(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one V(3) and one P(7) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one V(1) and one P(4) atom. In the ninth O site, O(9) is bonded in a water-like geometry to one V(3) and one P(8) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one V(1) and one P(6) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one V(2) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one V(3) and one P(2) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one V(1) and one P(4) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one V(4) and one P(3) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one V(2) and one P(5) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 120 degrees geometry to one P(3) and one P(8) atom. In the seventeenth O site, O(17) is bonded in a single-bond geometry to one P(5) atom. In the eighteenth O site, O(18) is bonded in a bent 150 degrees geometry to one V(4) and one P(2) atom. In the nineteenth O site, O(19) is bonded in a water-like geometry to one V(4) and one P(6) atom. In the twentieth O site, O(20) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. In the twenty-first O site, O(21) is bonded in a bent 150 degrees geometry to one V(3) and one P(4) atom. In the twenty-second O site, O(22) is bonded in a bent 150 degrees geometry to one V(2) and one P(2) atom. In the twenty-third O site, O(23) is bonded in a bent 150 degrees geometry to one V(1) and one P(7) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one V(3) and one P(1) atom. In the twenty-fifth O site, O(25) is bonded in a bent 150 degrees geometry to one V(2) and one P(3) atom. In the twenty-sixth O site, O(26) is bonded in a distorted bent 150 degrees geometry to one V(2) and one P(8) atom. In the twenty-seventh O site, O(27) is bonded in a 3-coordinate geometry to one V(1), one V(3), and one P(8) atom. In the twenty-eighth O site, O(28) is bonded in a bent 150 degrees geometry to one V(4) and one P(7) atom. is represented by the CIF card [CIF]
data_VP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.367
_cell_length_b   9.481
_cell_length_c   10.596
_cell_angle_alpha   115.321
_cell_angle_beta   85.422
_cell_angle_gamma   106.458
_symmetry_Int_Tables_number   1
_cell_volume   553.889
_cell_formula_units_Z   4
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
  V  V0  1  0.627  0.502  0.242  1.0
  V  V1  1  0.373  0.498  0.758  1.0
  V  V2  1  0.731  0.094  0.222  1.0
  V  V3  1  0.269  0.906  0.778  1.0
  P  P4  1  0.945  0.817  0.220  1.0
  P  P5  1  0.310  0.798  0.034  1.0
  P  P6  1  0.891  0.550  0.699  1.0
  P  P7  1  0.109  0.450  0.301  1.0
  P  P8  1  0.055  0.183  0.780  1.0
  P  P9  1  0.408  0.679  0.539  1.0
  P  P10  1  0.690  0.202  0.966  1.0
  P  P11  1  0.592  0.321  0.461  1.0
  O  O12  1  0.191  0.544  0.459  1.0
  O  O13  1  0.925  0.262  0.914  1.0
  O  O14  1  0.065  0.883  0.354  1.0
  O  O15  1  0.427  0.672  0.682  1.0
  O  O16  1  0.125  0.054  0.817  1.0
  O  O17  1  0.728  0.672  0.196  1.0
  O  O18  1  0.731  0.106  0.051  1.0
  O  O19  1  0.941  0.512  0.266  1.0
  O  O20  1  0.641  0.148  0.408  1.0
  O  O21  1  0.597  0.651  0.445  1.0
  O  O22  1  0.683  0.530  0.780  1.0
  O  O23  1  0.454  0.920  0.162  1.0
  O  O24  1  0.317  0.470  0.220  1.0
  O  O25  1  0.990  0.725  0.719  1.0
  O  O26  1  0.272  0.328  0.804  1.0
  O  O27  1  0.809  0.456  0.541  1.0
  O  O28  1  0.933  0.103  0.641  1.0
  O  O29  1  0.269  0.894  0.949  1.0
  O  O30  1  0.359  0.852  0.592  1.0
  O  O31  1  0.075  0.738  0.086  1.0
  O  O32  1  0.010  0.275  0.281  1.0
  O  O33  1  0.394  0.653  0.942  1.0
  O  O34  1  0.606  0.347  0.058  1.0
  O  O35  1  0.875  0.946  0.183  1.0
  O  O36  1  0.055  0.476  0.726  1.0
  O  O37  1  0.403  0.349  0.555  1.0
  O  O38  1  0.573  0.328  0.318  1.0
  O  O39  1  0.551  0.068  0.833  1.0
[/CIF]
.
The compound described by VO(PO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(10), one O(13), one O(23), one O(27), one O(6), and one O(8) atom to form VO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent P(4)O4 tetrahedra. In the second V site, V(2) is bonded to one O(11), one O(15), one O(22), one O(25), one O(26), and one O(4) atom to form VO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the third V site, V(3) is bonded in a 6-coordinate geometry to one O(12), one O(21), one O(24), one O(27), one O(7), and one O(9) atom. In the fourth V site, V(4) is bonded in a 6-coordinate geometry to one O(14), one O(18), one O(19), one O(28), one O(4), and one O(5) atom. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(20), one O(24), one O(3), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. In the second P site, P(2) is bonded to one O(12), one O(18), one O(20), and one O(22) atom to form PO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. In the third P site, P(3) is bonded to one O(11), one O(14), one O(16), and one O(25) atom to form PO4 tetrahedra that share corners with two equivalent V(2)O6 octahedra and  a cornercorner with one P(8)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-41°. In the fourth P site, P(4) is bonded to one O(1), one O(13), one O(21), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent V(1)O6 octahedra and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 30-41°. In the fifth P site, P(5) is bonded to one O(15), one O(17), one O(2), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra and  a cornercorner with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. In the sixth P site, P(6) is bonded to one O(1), one O(10), one O(19), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-45°. In the seventh P site, P(7) is bonded to one O(2), one O(23), one O(28), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. In the eighth P site, P(8) is bonded to one O(16), one O(26), one O(27), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-45°. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one P(4) and one P(6) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one P(5) and one P(7) atom. In the third O site, O(3) is bonded in a single-bond geometry to one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one V(2), one V(4), and one P(6) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one V(4) and one P(5) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one V(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one V(3) and one P(7) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one V(1) and one P(4) atom. In the ninth O site, O(9) is bonded in a water-like geometry to one V(3) and one P(8) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one V(1) and one P(6) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one V(2) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one V(3) and one P(2) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one V(1) and one P(4) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one V(4) and one P(3) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one V(2) and one P(5) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 120 degrees geometry to one P(3) and one P(8) atom. In the seventeenth O site, O(17) is bonded in a single-bond geometry to one P(5) atom. In the eighteenth O site, O(18) is bonded in a bent 150 degrees geometry to one V(4) and one P(2) atom. In the nineteenth O site, O(19) is bonded in a water-like geometry to one V(4) and one P(6) atom. In the twentieth O site, O(20) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. In the twenty-first O site, O(21) is bonded in a bent 150 degrees geometry to one V(3) and one P(4) atom. In the twenty-second O site, O(22) is bonded in a bent 150 degrees geometry to one V(2) and one P(2) atom. In the twenty-third O site, O(23) is bonded in a bent 150 degrees geometry to one V(1) and one P(7) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one V(3) and one P(1) atom. In the twenty-fifth O site, O(25) is bonded in a bent 150 degrees geometry to one V(2) and one P(3) atom. In the twenty-sixth O site, O(26) is bonded in a distorted bent 150 degrees geometry to one V(2) and one P(8) atom. In the twenty-seventh O site, O(27) is bonded in a 3-coordinate geometry to one V(1), one V(3), and one P(8) atom. In the twenty-eighth O site, O(28) is bonded in a bent 150 degrees geometry to one V(4) and one P(7) atom. is represented by the CIF card [CIF]
data_VP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.367
_cell_length_b   9.481
_cell_length_c   10.596
_cell_angle_alpha   115.321
_cell_angle_beta   85.422
_cell_angle_gamma   106.458
_symmetry_Int_Tables_number   1
_cell_volume   553.889
_cell_formula_units_Z   4
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
  V  V0  1  0.627  0.502  0.242  1.0
  V  V1  1  0.373  0.498  0.758  1.0
  V  V2  1  0.731  0.094  0.222  1.0
  V  V3  1  0.269  0.906  0.778  1.0
  P  P4  1  0.945  0.817  0.220  1.0
  P  P5  1  0.310  0.798  0.034  1.0
  P  P6  1  0.891  0.550  0.699  1.0
  P  P7  1  0.109  0.450  0.301  1.0
  P  P8  1  0.055  0.183  0.780  1.0
  P  P9  1  0.408  0.679  0.539  1.0
  P  P10  1  0.690  0.202  0.966  1.0
  P  P11  1  0.592  0.321  0.461  1.0
  O  O12  1  0.191  0.544  0.459  1.0
  O  O13  1  0.925  0.262  0.914  1.0
  O  O14  1  0.065  0.883  0.354  1.0
  O  O15  1  0.427  0.672  0.682  1.0
  O  O16  1  0.125  0.054  0.817  1.0
  O  O17  1  0.728  0.672  0.196  1.0
  O  O18  1  0.731  0.106  0.051  1.0
  O  O19  1  0.941  0.512  0.266  1.0
  O  O20  1  0.641  0.148  0.408  1.0
  O  O21  1  0.597  0.651  0.445  1.0
  O  O22  1  0.683  0.530  0.780  1.0
  O  O23  1  0.454  0.920  0.162  1.0
  O  O24  1  0.317  0.470  0.220  1.0
  O  O25  1  0.990  0.725  0.719  1.0
  O  O26  1  0.272  0.328  0.804  1.0
  O  O27  1  0.809  0.456  0.541  1.0
  O  O28  1  0.933  0.103  0.641  1.0
  O  O29  1  0.269  0.894  0.949  1.0
  O  O30  1  0.359  0.852  0.592  1.0
  O  O31  1  0.075  0.738  0.086  1.0
  O  O32  1  0.010  0.275  0.281  1.0
  O  O33  1  0.394  0.653  0.942  1.0
  O  O34  1  0.606  0.347  0.058  1.0
  O  O35  1  0.875  0.946  0.183  1.0
  O  O36  1  0.055  0.476  0.726  1.0
  O  O37  1  0.403  0.349  0.555  1.0
  O  O38  1  0.573  0.328  0.318  1.0
  O  O39  1  0.551  0.068  0.833  1.0
[/CIF]
.