The material structure described by BiP2O7 crystallizes in the monoclinic P2_1/c space group. Bi(1) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form BiO5 trigonal bipyramids that share corners with two equivalent P(2)O4 tetrahedra and corners with three equivalent P(1)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  a cornercorner with one P(2)O4 tetrahedra and corners with three equivalent Bi(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(2), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent Bi(1)O5 trigonal bipyramids. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Bi(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Bi(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Bi(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Bi(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one P(2) atom. is represented by the CIF card [CIF]
data_BiP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.585
_cell_length_b   7.759
_cell_length_c   9.825
_cell_angle_alpha   66.773
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   671.460
_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
  Bi  Bi0  1  0.067  0.681  0.183  1.0
  Bi  Bi1  1  0.433  0.681  0.683  1.0
  Bi  Bi2  1  0.567  0.319  0.317  1.0
  Bi  Bi3  1  0.933  0.319  0.817  1.0
  P  P4  1  0.718  0.539  0.532  1.0
  P  P5  1  0.239  0.084  0.232  1.0
  P  P6  1  0.739  0.916  0.268  1.0
  P  P7  1  0.261  0.084  0.732  1.0
  P  P8  1  0.782  0.539  0.032  1.0
  P  P9  1  0.761  0.916  0.768  1.0
  P  P10  1  0.218  0.461  0.968  1.0
  P  P11  1  0.282  0.461  0.468  1.0
  O  O12  1  0.136  0.472  0.395  1.0
  O  O13  1  0.197  0.243  0.071  1.0
  O  O14  1  0.272  0.901  0.711  1.0
  O  O15  1  0.114  0.124  0.773  1.0
  O  O16  1  0.864  0.528  0.605  1.0
  O  O17  1  0.803  0.757  0.929  1.0
  O  O18  1  0.222  0.577  0.063  1.0
  O  O19  1  0.903  0.492  0.142  1.0
  O  O20  1  0.614  0.876  0.727  1.0
  O  O21  1  0.722  0.423  0.437  1.0
  O  O22  1  0.364  0.472  0.895  1.0
  O  O23  1  0.863  0.907  0.651  1.0
  O  O24  1  0.636  0.528  0.105  1.0
  O  O25  1  0.728  0.099  0.289  1.0
  O  O26  1  0.403  0.508  0.358  1.0
  O  O27  1  0.778  0.423  0.937  1.0
  O  O28  1  0.886  0.876  0.227  1.0
  O  O29  1  0.228  0.901  0.211  1.0
  O  O30  1  0.137  0.093  0.349  1.0
  O  O31  1  0.597  0.492  0.642  1.0
  O  O32  1  0.303  0.243  0.571  1.0
  O  O33  1  0.278  0.577  0.563  1.0
  O  O34  1  0.097  0.508  0.858  1.0
  O  O35  1  0.386  0.124  0.273  1.0
  O  O36  1  0.697  0.757  0.429  1.0
  O  O37  1  0.637  0.907  0.151  1.0
  O  O38  1  0.772  0.099  0.789  1.0
  O  O39  1  0.363  0.093  0.849  1.0
[/CIF]
.
The material structure described by BiP2O7 crystallizes in the monoclinic P2_1/c space group. Bi(1) is bonded to one O(1), one O(3), one O(4), one O(5), and one O(6) atom to form BiO5 trigonal bipyramids that share corners with two equivalent P(2)O4 tetrahedra and corners with three equivalent P(1)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  a cornercorner with one P(2)O4 tetrahedra and corners with three equivalent Bi(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(2), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent Bi(1)O5 trigonal bipyramids. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Bi(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Bi(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Bi(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Bi(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one P(2) atom. is represented by the CIF card [CIF]
data_BiP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.585
_cell_length_b   7.759
_cell_length_c   9.825
_cell_angle_alpha   66.773
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   671.460
_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
  Bi  Bi0  1  0.067  0.681  0.183  1.0
  Bi  Bi1  1  0.433  0.681  0.683  1.0
  Bi  Bi2  1  0.567  0.319  0.317  1.0
  Bi  Bi3  1  0.933  0.319  0.817  1.0
  P  P4  1  0.718  0.539  0.532  1.0
  P  P5  1  0.239  0.084  0.232  1.0
  P  P6  1  0.739  0.916  0.268  1.0
  P  P7  1  0.261  0.084  0.732  1.0
  P  P8  1  0.782  0.539  0.032  1.0
  P  P9  1  0.761  0.916  0.768  1.0
  P  P10  1  0.218  0.461  0.968  1.0
  P  P11  1  0.282  0.461  0.468  1.0
  O  O12  1  0.136  0.472  0.395  1.0
  O  O13  1  0.197  0.243  0.071  1.0
  O  O14  1  0.272  0.901  0.711  1.0
  O  O15  1  0.114  0.124  0.773  1.0
  O  O16  1  0.864  0.528  0.605  1.0
  O  O17  1  0.803  0.757  0.929  1.0
  O  O18  1  0.222  0.577  0.063  1.0
  O  O19  1  0.903  0.492  0.142  1.0
  O  O20  1  0.614  0.876  0.727  1.0
  O  O21  1  0.722  0.423  0.437  1.0
  O  O22  1  0.364  0.472  0.895  1.0
  O  O23  1  0.863  0.907  0.651  1.0
  O  O24  1  0.636  0.528  0.105  1.0
  O  O25  1  0.728  0.099  0.289  1.0
  O  O26  1  0.403  0.508  0.358  1.0
  O  O27  1  0.778  0.423  0.937  1.0
  O  O28  1  0.886  0.876  0.227  1.0
  O  O29  1  0.228  0.901  0.211  1.0
  O  O30  1  0.137  0.093  0.349  1.0
  O  O31  1  0.597  0.492  0.642  1.0
  O  O32  1  0.303  0.243  0.571  1.0
  O  O33  1  0.278  0.577  0.563  1.0
  O  O34  1  0.097  0.508  0.858  1.0
  O  O35  1  0.386  0.124  0.273  1.0
  O  O36  1  0.697  0.757  0.429  1.0
  O  O37  1  0.637  0.907  0.151  1.0
  O  O38  1  0.772  0.099  0.789  1.0
  O  O39  1  0.363  0.093  0.849  1.0
[/CIF]
.