The material structure described by Bi6Cr2O15 crystallizes in the orthorhombic Ccc2 space group. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(3), one O(4), one O(7), and two equivalent O(5) atoms. In the second Bi site, Bi(2) is bonded in a 4-coordinate geometry to one O(1), one O(7), and two equivalent O(6) atoms. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(7), and two equivalent O(8) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cr(1) and one Bi(2) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Cr(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cr(1) and one Bi(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cr(1) and one Bi(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Bi(3) and two equivalent Bi(1) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(2), and one Bi(3) atom. In the eighth O site, O(8) is bonded to four equivalent Bi(3) atoms to form distorted edge-sharing OBi4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr2(Bi2O5)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.738
_cell_length_b   11.738
_cell_length_c   5.882
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.201
_symmetry_Int_Tables_number   1
_cell_volume   727.168
_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
  Cr  Cr0  1  0.532  0.206  0.853  1.0
  Cr  Cr1  1  0.468  0.794  0.853  1.0
  Cr  Cr2  1  0.794  0.468  0.353  1.0
  Cr  Cr3  1  0.206  0.532  0.353  1.0
  Bi  Bi4  1  0.389  0.253  0.327  1.0
  Bi  Bi5  1  0.611  0.747  0.327  1.0
  Bi  Bi6  1  0.747  0.611  0.827  1.0
  Bi  Bi7  1  0.253  0.389  0.827  1.0
  Bi  Bi8  1  0.302  0.900  0.328  1.0
  Bi  Bi9  1  0.698  0.100  0.328  1.0
  Bi  Bi10  1  0.100  0.698  0.828  1.0
  Bi  Bi11  1  0.900  0.302  0.828  1.0
  Bi  Bi12  1  0.173  0.045  0.731  1.0
  Bi  Bi13  1  0.827  0.955  0.731  1.0
  Bi  Bi14  1  0.955  0.827  0.231  1.0
  Bi  Bi15  1  0.045  0.173  0.231  1.0
  O  O16  1  0.676  0.224  0.921  1.0
  O  O17  1  0.324  0.776  0.921  1.0
  O  O18  1  0.776  0.324  0.421  1.0
  O  O19  1  0.224  0.676  0.421  1.0
  O  O20  1  0.526  0.341  0.859  1.0
  O  O21  1  0.474  0.659  0.859  1.0
  O  O22  1  0.659  0.474  0.359  1.0
  O  O23  1  0.341  0.526  0.359  1.0
  O  O24  1  0.431  0.113  0.051  1.0
  O  O25  1  0.569  0.887  0.051  1.0
  O  O26  1  0.887  0.569  0.551  1.0
  O  O27  1  0.113  0.431  0.551  1.0
  O  O28  1  0.491  0.142  0.598  1.0
  O  O29  1  0.509  0.858  0.598  1.0
  O  O30  1  0.858  0.509  0.098  1.0
  O  O31  1  0.142  0.491  0.098  1.0
  O  O32  1  0.253  0.256  0.090  1.0
  O  O33  1  0.747  0.744  0.090  1.0
  O  O34  1  0.744  0.747  0.590  1.0
  O  O35  1  0.256  0.253  0.590  1.0
  O  O36  1  0.856  0.168  0.108  1.0
  O  O37  1  0.144  0.832  0.108  1.0
  O  O38  1  0.832  0.144  0.608  1.0
  O  O39  1  0.168  0.856  0.608  1.0
  O  O40  1  0.747  0.940  0.379  1.0
  O  O41  1  0.253  0.060  0.379  1.0
  O  O42  1  0.060  0.253  0.879  1.0
  O  O43  1  0.940  0.747  0.879  1.0
  O  O44  1  0.000  0.000  0.047  1.0
  O  O45  1  0.000  0.000  0.547  1.0
[/CIF]
.
The material structure described by Bi6Cr2O15 crystallizes in the orthorhombic Ccc2 space group. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(3), one O(4), one O(7), and two equivalent O(5) atoms. In the second Bi site, Bi(2) is bonded in a 4-coordinate geometry to one O(1), one O(7), and two equivalent O(6) atoms. In the third Bi site, Bi(3) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(7), and two equivalent O(8) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cr(1) and one Bi(2) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Cr(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cr(1) and one Bi(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cr(1) and one Bi(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Bi(3) and two equivalent Bi(1) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Bi(3) and two equivalent Bi(2) atoms. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(2), and one Bi(3) atom. In the eighth O site, O(8) is bonded to four equivalent Bi(3) atoms to form distorted edge-sharing OBi4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr2(Bi2O5)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.738
_cell_length_b   11.738
_cell_length_c   5.882
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.201
_symmetry_Int_Tables_number   1
_cell_volume   727.168
_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
  Cr  Cr0  1  0.532  0.206  0.853  1.0
  Cr  Cr1  1  0.468  0.794  0.853  1.0
  Cr  Cr2  1  0.794  0.468  0.353  1.0
  Cr  Cr3  1  0.206  0.532  0.353  1.0
  Bi  Bi4  1  0.389  0.253  0.327  1.0
  Bi  Bi5  1  0.611  0.747  0.327  1.0
  Bi  Bi6  1  0.747  0.611  0.827  1.0
  Bi  Bi7  1  0.253  0.389  0.827  1.0
  Bi  Bi8  1  0.302  0.900  0.328  1.0
  Bi  Bi9  1  0.698  0.100  0.328  1.0
  Bi  Bi10  1  0.100  0.698  0.828  1.0
  Bi  Bi11  1  0.900  0.302  0.828  1.0
  Bi  Bi12  1  0.173  0.045  0.731  1.0
  Bi  Bi13  1  0.827  0.955  0.731  1.0
  Bi  Bi14  1  0.955  0.827  0.231  1.0
  Bi  Bi15  1  0.045  0.173  0.231  1.0
  O  O16  1  0.676  0.224  0.921  1.0
  O  O17  1  0.324  0.776  0.921  1.0
  O  O18  1  0.776  0.324  0.421  1.0
  O  O19  1  0.224  0.676  0.421  1.0
  O  O20  1  0.526  0.341  0.859  1.0
  O  O21  1  0.474  0.659  0.859  1.0
  O  O22  1  0.659  0.474  0.359  1.0
  O  O23  1  0.341  0.526  0.359  1.0
  O  O24  1  0.431  0.113  0.051  1.0
  O  O25  1  0.569  0.887  0.051  1.0
  O  O26  1  0.887  0.569  0.551  1.0
  O  O27  1  0.113  0.431  0.551  1.0
  O  O28  1  0.491  0.142  0.598  1.0
  O  O29  1  0.509  0.858  0.598  1.0
  O  O30  1  0.858  0.509  0.098  1.0
  O  O31  1  0.142  0.491  0.098  1.0
  O  O32  1  0.253  0.256  0.090  1.0
  O  O33  1  0.747  0.744  0.090  1.0
  O  O34  1  0.744  0.747  0.590  1.0
  O  O35  1  0.256  0.253  0.590  1.0
  O  O36  1  0.856  0.168  0.108  1.0
  O  O37  1  0.144  0.832  0.108  1.0
  O  O38  1  0.832  0.144  0.608  1.0
  O  O39  1  0.168  0.856  0.608  1.0
  O  O40  1  0.747  0.940  0.379  1.0
  O  O41  1  0.253  0.060  0.379  1.0
  O  O42  1  0.060  0.253  0.879  1.0
  O  O43  1  0.940  0.747  0.879  1.0
  O  O44  1  0.000  0.000  0.047  1.0
  O  O45  1  0.000  0.000  0.547  1.0
[/CIF]
.