The material structure described by Cr2(PO3)5 crystallizes in the monoclinic Pc space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(12), one O(15), one O(4), one O(5), one O(6), and one O(7) atom to form CrO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one Cr(2)O6 octahedra. In the second Cr site, Cr(2) is bonded to one O(2), one O(3), one O(4), one O(7), one O(8), and one O(9) atom to form CrO6 octahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(5)O4 tetrahedra, and  an edgeedge with one Cr(1)O6 octahedra. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-49°. In the second P site, P(2) is bonded to one O(1), one O(11), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 17-59°. In the third P site, P(3) is bonded to one O(10), one O(12), one O(13), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. In the fourth P site, P(4) is bonded to one O(11), one O(14), one O(15), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(2)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 17-57°. In the fifth P site, P(5) is bonded to one O(13), one O(14), one O(2), and one O(3) atom to form PO4 tetrahedra that share corners with two equivalent Cr(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-50°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cr(2) and one P(5) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Cr(2) and one P(5) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one Cr(2) and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Cr(2) and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(3) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one P(3) and one P(5) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one P(4) and one P(5) atom. In the fifteenth O site, O(15) is bonded in a distorted linear geometry to one Cr(1) and one P(4) atom. is represented by the CIF card [CIF]
data_Cr2(PO3)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.970
_cell_length_b   8.358
_cell_length_c   5.304
_cell_angle_alpha   90.000
_cell_angle_beta   94.191
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   573.422
_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  0.964  0.296  0.889  1.0
  Cr  Cr1  1  0.537  0.296  0.610  1.0
  Cr  Cr2  1  0.464  0.704  0.389  1.0
  Cr  Cr3  1  0.037  0.704  0.110  1.0
  P  P4  1  0.603  0.825  0.937  1.0
  P  P5  1  0.644  0.501  0.129  1.0
  P  P6  1  0.751  0.072  0.750  1.0
  P  P7  1  0.857  0.499  0.370  1.0
  P  P8  1  0.103  0.175  0.437  1.0
  P  P9  1  0.144  0.499  0.629  1.0
  P  P10  1  0.251  0.928  0.250  1.0
  P  P11  1  0.357  0.501  0.870  1.0
  P  P12  1  0.399  0.175  0.061  1.0
  P  P13  1  0.899  0.825  0.561  1.0
  O  O14  1  0.675  0.670  0.018  1.0
  O  O15  1  0.964  0.860  0.346  1.0
  O  O16  1  0.948  0.798  0.821  1.0
  O  O17  1  0.927  0.513  0.150  1.0
  O  O18  1  0.037  0.142  0.654  1.0
  O  O19  1  0.053  0.201  0.178  1.0
  O  O20  1  0.074  0.481  0.848  1.0
  O  O21  1  0.175  0.330  0.518  1.0
  O  O22  1  0.110  0.610  0.420  1.0
  O  O23  1  0.171  0.841  0.084  1.0
  O  O24  1  0.194  0.046  0.439  1.0
  O  O25  1  0.250  0.567  0.751  1.0
  O  O26  1  0.332  0.842  0.416  1.0
  O  O27  1  0.307  0.048  0.062  1.0
  O  O28  1  0.327  0.331  0.977  1.0
  O  O29  1  0.390  0.610  0.081  1.0
  O  O30  1  0.427  0.487  0.650  1.0
  O  O31  1  0.464  0.140  0.846  1.0
  O  O32  1  0.448  0.202  0.321  1.0
  O  O33  1  0.827  0.669  0.477  1.0
  O  O34  1  0.537  0.858  0.154  1.0
  O  O35  1  0.574  0.519  0.348  1.0
  O  O36  1  0.890  0.390  0.581  1.0
  O  O37  1  0.610  0.390  0.920  1.0
  O  O38  1  0.671  0.159  0.584  1.0
  O  O39  1  0.694  0.954  0.939  1.0
  O  O40  1  0.750  0.433  0.251  1.0
  O  O41  1  0.832  0.158  0.916  1.0
  O  O42  1  0.807  0.952  0.562  1.0
  O  O43  1  0.553  0.799  0.678  1.0
[/CIF]
.
The material structure described by Cr2(PO3)5 crystallizes in the monoclinic Pc space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(12), one O(15), one O(4), one O(5), one O(6), and one O(7) atom to form CrO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one Cr(2)O6 octahedra. In the second Cr site, Cr(2) is bonded to one O(2), one O(3), one O(4), one O(7), one O(8), and one O(9) atom to form CrO6 octahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(5)O4 tetrahedra, and  an edgeedge with one Cr(1)O6 octahedra. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-49°. In the second P site, P(2) is bonded to one O(1), one O(11), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 17-59°. In the third P site, P(3) is bonded to one O(10), one O(12), one O(13), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. In the fourth P site, P(4) is bonded to one O(11), one O(14), one O(15), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(2)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 17-57°. In the fifth P site, P(5) is bonded to one O(13), one O(14), one O(2), and one O(3) atom to form PO4 tetrahedra that share corners with two equivalent Cr(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-50°. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cr(2) and one P(5) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Cr(2) and one P(5) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one Cr(2) and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Cr(2) and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(3) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one P(3) and one P(5) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one P(4) and one P(5) atom. In the fifteenth O site, O(15) is bonded in a distorted linear geometry to one Cr(1) and one P(4) atom. is represented by the CIF card [CIF]
data_Cr2(PO3)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.970
_cell_length_b   8.358
_cell_length_c   5.304
_cell_angle_alpha   90.000
_cell_angle_beta   94.191
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   573.422
_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  0.964  0.296  0.889  1.0
  Cr  Cr1  1  0.537  0.296  0.610  1.0
  Cr  Cr2  1  0.464  0.704  0.389  1.0
  Cr  Cr3  1  0.037  0.704  0.110  1.0
  P  P4  1  0.603  0.825  0.937  1.0
  P  P5  1  0.644  0.501  0.129  1.0
  P  P6  1  0.751  0.072  0.750  1.0
  P  P7  1  0.857  0.499  0.370  1.0
  P  P8  1  0.103  0.175  0.437  1.0
  P  P9  1  0.144  0.499  0.629  1.0
  P  P10  1  0.251  0.928  0.250  1.0
  P  P11  1  0.357  0.501  0.870  1.0
  P  P12  1  0.399  0.175  0.061  1.0
  P  P13  1  0.899  0.825  0.561  1.0
  O  O14  1  0.675  0.670  0.018  1.0
  O  O15  1  0.964  0.860  0.346  1.0
  O  O16  1  0.948  0.798  0.821  1.0
  O  O17  1  0.927  0.513  0.150  1.0
  O  O18  1  0.037  0.142  0.654  1.0
  O  O19  1  0.053  0.201  0.178  1.0
  O  O20  1  0.074  0.481  0.848  1.0
  O  O21  1  0.175  0.330  0.518  1.0
  O  O22  1  0.110  0.610  0.420  1.0
  O  O23  1  0.171  0.841  0.084  1.0
  O  O24  1  0.194  0.046  0.439  1.0
  O  O25  1  0.250  0.567  0.751  1.0
  O  O26  1  0.332  0.842  0.416  1.0
  O  O27  1  0.307  0.048  0.062  1.0
  O  O28  1  0.327  0.331  0.977  1.0
  O  O29  1  0.390  0.610  0.081  1.0
  O  O30  1  0.427  0.487  0.650  1.0
  O  O31  1  0.464  0.140  0.846  1.0
  O  O32  1  0.448  0.202  0.321  1.0
  O  O33  1  0.827  0.669  0.477  1.0
  O  O34  1  0.537  0.858  0.154  1.0
  O  O35  1  0.574  0.519  0.348  1.0
  O  O36  1  0.890  0.390  0.581  1.0
  O  O37  1  0.610  0.390  0.920  1.0
  O  O38  1  0.671  0.159  0.584  1.0
  O  O39  1  0.694  0.954  0.939  1.0
  O  O40  1  0.750  0.433  0.251  1.0
  O  O41  1  0.832  0.158  0.916  1.0
  O  O42  1  0.807  0.952  0.562  1.0
  O  O43  1  0.553  0.799  0.678  1.0
[/CIF]
.