The material structure described by SbP2O7 crystallizes in the monoclinic P2_1/c space group. Sb(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form SbO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Sb(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 18-47°. In the second P site, P(2) is bonded to one O(3), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Sb(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-48°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Sb(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sb(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Sb(1) and one P(2) atom. is represented by the CIF file [CIF]
data_SbP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.282
_cell_length_b   8.980
_cell_length_c   13.884
_cell_angle_alpha   63.604
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   589.968
_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
  Sb  Sb0  1  0.239  0.269  0.972  1.0
  Sb  Sb1  1  0.739  0.731  0.528  1.0
  Sb  Sb2  1  0.261  0.269  0.472  1.0
  Sb  Sb3  1  0.761  0.731  0.028  1.0
  P  P4  1  0.751  0.173  0.859  1.0
  P  P5  1  0.235  0.692  0.379  1.0
  P  P6  1  0.251  0.827  0.641  1.0
  P  P7  1  0.265  0.692  0.879  1.0
  P  P8  1  0.735  0.308  0.121  1.0
  P  P9  1  0.749  0.173  0.359  1.0
  P  P10  1  0.765  0.308  0.621  1.0
  P  P11  1  0.249  0.827  0.141  1.0
  O  O12  1  0.019  0.243  0.856  1.0
  O  O13  1  0.545  0.289  0.866  1.0
  O  O14  1  0.665  0.473  0.614  1.0
  O  O15  1  0.951  0.688  0.405  1.0
  O  O16  1  0.278  0.829  0.256  1.0
  O  O17  1  0.283  0.006  0.058  1.0
  O  O18  1  0.389  0.760  0.444  1.0
  O  O19  1  0.165  0.527  0.886  1.0
  O  O20  1  0.045  0.711  0.634  1.0
  O  O21  1  0.519  0.757  0.644  1.0
  O  O22  1  0.889  0.240  0.056  1.0
  O  O23  1  0.783  0.994  0.442  1.0
  O  O24  1  0.549  0.688  0.905  1.0
  O  O25  1  0.778  0.171  0.244  1.0
  O  O26  1  0.222  0.829  0.756  1.0
  O  O27  1  0.451  0.312  0.095  1.0
  O  O28  1  0.217  0.006  0.558  1.0
  O  O29  1  0.111  0.760  0.944  1.0
  O  O30  1  0.481  0.243  0.356  1.0
  O  O31  1  0.955  0.289  0.366  1.0
  O  O32  1  0.835  0.473  0.114  1.0
  O  O33  1  0.611  0.240  0.556  1.0
  O  O34  1  0.717  0.994  0.942  1.0
  O  O35  1  0.722  0.171  0.744  1.0
  O  O36  1  0.049  0.312  0.595  1.0
  O  O37  1  0.335  0.527  0.386  1.0
  O  O38  1  0.455  0.711  0.134  1.0
  O  O39  1  0.981  0.757  0.144  1.0
[/CIF]
.
The material structure described by SbP2O7 crystallizes in the monoclinic P2_1/c space group. Sb(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form SbO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Sb(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 18-47°. In the second P site, P(2) is bonded to one O(3), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Sb(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-48°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Sb(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sb(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Sb(1) and one P(2) atom. is represented by the CIF file [CIF]
data_SbP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.282
_cell_length_b   8.980
_cell_length_c   13.884
_cell_angle_alpha   63.604
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   589.968
_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
  Sb  Sb0  1  0.239  0.269  0.972  1.0
  Sb  Sb1  1  0.739  0.731  0.528  1.0
  Sb  Sb2  1  0.261  0.269  0.472  1.0
  Sb  Sb3  1  0.761  0.731  0.028  1.0
  P  P4  1  0.751  0.173  0.859  1.0
  P  P5  1  0.235  0.692  0.379  1.0
  P  P6  1  0.251  0.827  0.641  1.0
  P  P7  1  0.265  0.692  0.879  1.0
  P  P8  1  0.735  0.308  0.121  1.0
  P  P9  1  0.749  0.173  0.359  1.0
  P  P10  1  0.765  0.308  0.621  1.0
  P  P11  1  0.249  0.827  0.141  1.0
  O  O12  1  0.019  0.243  0.856  1.0
  O  O13  1  0.545  0.289  0.866  1.0
  O  O14  1  0.665  0.473  0.614  1.0
  O  O15  1  0.951  0.688  0.405  1.0
  O  O16  1  0.278  0.829  0.256  1.0
  O  O17  1  0.283  0.006  0.058  1.0
  O  O18  1  0.389  0.760  0.444  1.0
  O  O19  1  0.165  0.527  0.886  1.0
  O  O20  1  0.045  0.711  0.634  1.0
  O  O21  1  0.519  0.757  0.644  1.0
  O  O22  1  0.889  0.240  0.056  1.0
  O  O23  1  0.783  0.994  0.442  1.0
  O  O24  1  0.549  0.688  0.905  1.0
  O  O25  1  0.778  0.171  0.244  1.0
  O  O26  1  0.222  0.829  0.756  1.0
  O  O27  1  0.451  0.312  0.095  1.0
  O  O28  1  0.217  0.006  0.558  1.0
  O  O29  1  0.111  0.760  0.944  1.0
  O  O30  1  0.481  0.243  0.356  1.0
  O  O31  1  0.955  0.289  0.366  1.0
  O  O32  1  0.835  0.473  0.114  1.0
  O  O33  1  0.611  0.240  0.556  1.0
  O  O34  1  0.717  0.994  0.942  1.0
  O  O35  1  0.722  0.171  0.744  1.0
  O  O36  1  0.049  0.312  0.595  1.0
  O  O37  1  0.335  0.527  0.386  1.0
  O  O38  1  0.455  0.711  0.134  1.0
  O  O39  1  0.981  0.757  0.144  1.0
[/CIF]
.