The material structure described by BiP2O7 crystallizes in the triclinic P-1 space group. Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form corner-sharing PO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one P(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Bi(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Bi(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a 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 120 degrees geometry to one Bi(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Bi(1) and one P(1) atom. is represented by the CIF file [CIF]
data_BiP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.543
_cell_length_b   6.778
_cell_length_c   6.931
_cell_angle_alpha   90.989
_cell_angle_beta   108.073
_cell_angle_gamma   92.266
_symmetry_Int_Tables_number   1
_cell_volume   291.855
_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
  Bi  Bi0  1  0.185  0.849  0.720  1.0
  Bi  Bi1  1  0.815  0.151  0.280  1.0
  P  P2  1  0.290  0.346  0.654  1.0
  P  P3  1  0.710  0.654  0.346  1.0
  P  P4  1  0.675  0.111  0.754  1.0
  P  P5  1  0.325  0.889  0.246  1.0
  O  O6  1  0.867  0.647  0.562  1.0
  O  O7  1  0.542  0.929  0.781  1.0
  O  O8  1  0.458  0.071  0.219  1.0
  O  O9  1  0.812  0.063  0.616  1.0
  O  O10  1  0.224  0.197  0.789  1.0
  O  O11  1  0.521  0.280  0.637  1.0
  O  O12  1  0.820  0.199  0.961  1.0
  O  O13  1  0.133  0.353  0.438  1.0
  O  O14  1  0.776  0.803  0.211  1.0
  O  O15  1  0.340  0.552  0.757  1.0
  O  O16  1  0.660  0.448  0.243  1.0
  O  O17  1  0.180  0.801  0.039  1.0
  O  O18  1  0.479  0.720  0.363  1.0
  O  O19  1  0.188  0.937  0.384  1.0
[/CIF]
.
The material structure described by BiP2O7 crystallizes in the triclinic P-1 space group. Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form corner-sharing PO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one P(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Bi(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Bi(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Bi(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a 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 120 degrees geometry to one Bi(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Bi(1) and one P(1) atom. is represented by the CIF file [CIF]
data_BiP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.543
_cell_length_b   6.778
_cell_length_c   6.931
_cell_angle_alpha   90.989
_cell_angle_beta   108.073
_cell_angle_gamma   92.266
_symmetry_Int_Tables_number   1
_cell_volume   291.855
_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
  Bi  Bi0  1  0.185  0.849  0.720  1.0
  Bi  Bi1  1  0.815  0.151  0.280  1.0
  P  P2  1  0.290  0.346  0.654  1.0
  P  P3  1  0.710  0.654  0.346  1.0
  P  P4  1  0.675  0.111  0.754  1.0
  P  P5  1  0.325  0.889  0.246  1.0
  O  O6  1  0.867  0.647  0.562  1.0
  O  O7  1  0.542  0.929  0.781  1.0
  O  O8  1  0.458  0.071  0.219  1.0
  O  O9  1  0.812  0.063  0.616  1.0
  O  O10  1  0.224  0.197  0.789  1.0
  O  O11  1  0.521  0.280  0.637  1.0
  O  O12  1  0.820  0.199  0.961  1.0
  O  O13  1  0.133  0.353  0.438  1.0
  O  O14  1  0.776  0.803  0.211  1.0
  O  O15  1  0.340  0.552  0.757  1.0
  O  O16  1  0.660  0.448  0.243  1.0
  O  O17  1  0.180  0.801  0.039  1.0
  O  O18  1  0.479  0.720  0.363  1.0
  O  O19  1  0.188  0.937  0.384  1.0
[/CIF]
.