The structure described by Bi6P2O15 crystallizes in the orthorhombic Ccc2 space group. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), one O(7), and two equivalent O(8) atoms to form a mixture of distorted edge and corner-sharing BiO5 square pyramids. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(6), and two equivalent O(7) atoms. P(1) is bonded in a tetrahedral geometry to one O(3), one O(4), one O(5), and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(2), and one Bi(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Bi(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Bi(2) and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Bi(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Bi(3) and one P(1) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Bi(1) and two equivalent Bi(3) atoms. In the eighth O site, O(8) is bonded to four equivalent Bi(1) atoms to form edge-sharing OBi4 tetrahedra. is represented by the CIF file [CIF]
data_Bi6P2O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.578
_cell_length_b   11.578
_cell_length_c   5.871
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.320
_symmetry_Int_Tables_number   1
_cell_volume   705.361
_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  0.178  0.048  0.733  1.0
  Bi  Bi1  1  0.048  0.178  0.233  1.0
  Bi  Bi2  1  0.407  0.258  0.330  1.0
  Bi  Bi3  1  0.258  0.407  0.830  1.0
  Bi  Bi4  1  0.693  0.107  0.327  1.0
  Bi  Bi5  1  0.107  0.693  0.827  1.0
  Bi  Bi6  1  0.893  0.307  0.827  1.0
  Bi  Bi7  1  0.307  0.893  0.327  1.0
  Bi  Bi8  1  0.593  0.742  0.330  1.0
  Bi  Bi9  1  0.742  0.593  0.830  1.0
  Bi  Bi10  1  0.952  0.822  0.233  1.0
  Bi  Bi11  1  0.822  0.952  0.733  1.0
  P  P12  1  0.540  0.218  0.850  1.0
  P  P13  1  0.218  0.540  0.350  1.0
  P  P14  1  0.782  0.460  0.350  1.0
  P  P15  1  0.460  0.782  0.850  1.0
  O  O16  1  0.258  0.063  0.376  1.0
  O  O17  1  0.063  0.258  0.876  1.0
  O  O18  1  0.264  0.272  0.100  1.0
  O  O19  1  0.272  0.264  0.600  1.0
  O  O20  1  0.438  0.133  0.032  1.0
  O  O21  1  0.133  0.438  0.532  1.0
  O  O22  1  0.499  0.155  0.612  1.0
  O  O23  1  0.155  0.499  0.112  1.0
  O  O24  1  0.353  0.542  0.354  1.0
  O  O25  1  0.542  0.353  0.854  1.0
  O  O26  1  0.670  0.222  0.927  1.0
  O  O27  1  0.222  0.670  0.427  1.0
  O  O28  1  0.832  0.145  0.606  1.0
  O  O29  1  0.145  0.832  0.106  1.0
  O  O30  1  0.000  0.000  0.042  1.0
  O  O31  1  0.000  0.000  0.542  1.0
  O  O32  1  0.855  0.168  0.106  1.0
  O  O33  1  0.168  0.855  0.606  1.0
  O  O34  1  0.778  0.330  0.427  1.0
  O  O35  1  0.330  0.778  0.927  1.0
  O  O36  1  0.647  0.458  0.354  1.0
  O  O37  1  0.458  0.647  0.854  1.0
  O  O38  1  0.501  0.845  0.612  1.0
  O  O39  1  0.845  0.501  0.112  1.0
  O  O40  1  0.867  0.562  0.532  1.0
  O  O41  1  0.562  0.867  0.032  1.0
  O  O42  1  0.736  0.728  0.100  1.0
  O  O43  1  0.728  0.736  0.600  1.0
  O  O44  1  0.937  0.742  0.876  1.0
  O  O45  1  0.742  0.937  0.376  1.0
[/CIF]
.
The structure described by Bi6P2O15 crystallizes in the orthorhombic Ccc2 space group. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), one O(7), and two equivalent O(8) atoms to form a mixture of distorted edge and corner-sharing BiO5 square pyramids. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(6), and two equivalent O(7) atoms. P(1) is bonded in a tetrahedral geometry to one O(3), one O(4), one O(5), and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(2), and one Bi(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Bi(1) and two equivalent Bi(2) atoms. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Bi(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Bi(2) and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Bi(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Bi(3) and one P(1) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Bi(1) and two equivalent Bi(3) atoms. In the eighth O site, O(8) is bonded to four equivalent Bi(1) atoms to form edge-sharing OBi4 tetrahedra. is represented by the CIF file [CIF]
data_Bi6P2O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.578
_cell_length_b   11.578
_cell_length_c   5.871
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.320
_symmetry_Int_Tables_number   1
_cell_volume   705.361
_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  0.178  0.048  0.733  1.0
  Bi  Bi1  1  0.048  0.178  0.233  1.0
  Bi  Bi2  1  0.407  0.258  0.330  1.0
  Bi  Bi3  1  0.258  0.407  0.830  1.0
  Bi  Bi4  1  0.693  0.107  0.327  1.0
  Bi  Bi5  1  0.107  0.693  0.827  1.0
  Bi  Bi6  1  0.893  0.307  0.827  1.0
  Bi  Bi7  1  0.307  0.893  0.327  1.0
  Bi  Bi8  1  0.593  0.742  0.330  1.0
  Bi  Bi9  1  0.742  0.593  0.830  1.0
  Bi  Bi10  1  0.952  0.822  0.233  1.0
  Bi  Bi11  1  0.822  0.952  0.733  1.0
  P  P12  1  0.540  0.218  0.850  1.0
  P  P13  1  0.218  0.540  0.350  1.0
  P  P14  1  0.782  0.460  0.350  1.0
  P  P15  1  0.460  0.782  0.850  1.0
  O  O16  1  0.258  0.063  0.376  1.0
  O  O17  1  0.063  0.258  0.876  1.0
  O  O18  1  0.264  0.272  0.100  1.0
  O  O19  1  0.272  0.264  0.600  1.0
  O  O20  1  0.438  0.133  0.032  1.0
  O  O21  1  0.133  0.438  0.532  1.0
  O  O22  1  0.499  0.155  0.612  1.0
  O  O23  1  0.155  0.499  0.112  1.0
  O  O24  1  0.353  0.542  0.354  1.0
  O  O25  1  0.542  0.353  0.854  1.0
  O  O26  1  0.670  0.222  0.927  1.0
  O  O27  1  0.222  0.670  0.427  1.0
  O  O28  1  0.832  0.145  0.606  1.0
  O  O29  1  0.145  0.832  0.106  1.0
  O  O30  1  0.000  0.000  0.042  1.0
  O  O31  1  0.000  0.000  0.542  1.0
  O  O32  1  0.855  0.168  0.106  1.0
  O  O33  1  0.168  0.855  0.606  1.0
  O  O34  1  0.778  0.330  0.427  1.0
  O  O35  1  0.330  0.778  0.927  1.0
  O  O36  1  0.647  0.458  0.354  1.0
  O  O37  1  0.458  0.647  0.854  1.0
  O  O38  1  0.501  0.845  0.612  1.0
  O  O39  1  0.845  0.501  0.112  1.0
  O  O40  1  0.867  0.562  0.532  1.0
  O  O41  1  0.562  0.867  0.032  1.0
  O  O42  1  0.736  0.728  0.100  1.0
  O  O43  1  0.728  0.736  0.600  1.0
  O  O44  1  0.937  0.742  0.876  1.0
  O  O45  1  0.742  0.937  0.376  1.0
[/CIF]
.