The material structure described by Cr(PO3)2 crystallizes in the monoclinic Cc space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(12), one O(2), one O(5), and one O(7) atom to form CrO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to one O(1), one O(11), one O(3), and one O(4) atom to form CrO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(4), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent Cr(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(2), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent Cr(1)O4 tetrahedra. In the third P site, P(3) is bonded to one O(3), one O(6), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. In the fourth P site, P(4) is bonded to one O(10), one O(11), one O(12), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(2) atom. In the second O site, O(6) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the third O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one P(3) atom. In the fourth O site, O(8) is bonded in a bent 120 degrees geometry to one P(2) and one P(4) atom. In the fifth O site, O(9) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the sixth O site, O(10) is bonded in a bent 150 degrees geometry to one P(1) and one P(4) atom. In the seventh O site, O(11) is bonded in a bent 150 degrees geometry to one Cr(2) and one P(4) atom. In the eighth O site, O(12) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(4) atom. In the ninth O site, O(1) is bonded in a bent 150 degrees geometry to one Cr(2) and one P(1) atom. In the tenth O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(2) atom. In the eleventh O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Cr(2) and one P(3) atom. In the twelfth O site, O(4) is bonded in a linear geometry to one Cr(2) and one P(1) atom. is represented by the CIF file [CIF]
data_Cr(PO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.684
_cell_length_b   5.684
_cell_length_c   16.511
_cell_angle_alpha   87.395
_cell_angle_beta   87.395
_cell_angle_gamma   89.884
_symmetry_Int_Tables_number   1
_cell_volume   532.409
_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
  Cr  Cr0  1  0.064  0.852  0.907  1.0
  Cr  Cr1  1  0.852  0.064  0.407  1.0
  Cr  Cr2  1  0.677  0.063  0.615  1.0
  Cr  Cr3  1  0.063  0.677  0.115  1.0
  P  P4  1  0.004  0.563  0.650  1.0
  P  P5  1  0.563  0.004  0.150  1.0
  P  P6  1  0.565  0.522  0.874  1.0
  P  P7  1  0.273  0.791  0.511  1.0
  P  P8  1  0.522  0.565  0.374  1.0
  P  P9  1  0.791  0.273  0.011  1.0
  P  P10  1  0.295  0.256  0.759  1.0
  P  P11  1  0.256  0.295  0.259  1.0
  O  O12  1  0.884  0.790  0.666  1.0
  O  O13  1  0.790  0.884  0.166  1.0
  O  O14  1  0.772  0.680  0.859  1.0
  O  O15  1  0.680  0.772  0.359  1.0
  O  O16  1  0.504  0.912  0.524  1.0
  O  O17  1  0.912  0.504  0.024  1.0
  O  O18  1  0.863  0.363  0.622  1.0
  O  O19  1  0.363  0.863  0.122  1.0
  O  O20  1  0.335  0.622  0.903  1.0
  O  O21  1  0.627  0.302  0.935  1.0
  O  O22  1  0.056  0.940  0.499  1.0
  O  O23  1  0.622  0.335  0.403  1.0
  O  O24  1  0.525  0.384  0.792  1.0
  O  O25  1  0.302  0.627  0.435  1.0
  O  O26  1  0.940  0.056  0.999  1.0
  O  O27  1  0.384  0.525  0.292  1.0
  O  O28  1  0.226  0.605  0.586  1.0
  O  O29  1  0.605  0.226  0.086  1.0
  O  O30  1  0.140  0.481  0.730  1.0
  O  O31  1  0.481  0.140  0.230  1.0
  O  O32  1  0.379  0.120  0.688  1.0
  O  O33  1  0.120  0.379  0.188  1.0
  O  O34  1  0.160  0.132  0.828  1.0
  O  O35  1  0.132  0.160  0.328  1.0
[/CIF]
.
The material structure described by Cr(PO3)2 crystallizes in the monoclinic Cc space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(12), one O(2), one O(5), and one O(7) atom to form CrO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to one O(1), one O(11), one O(3), and one O(4) atom to form CrO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(4), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent Cr(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(2), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent Cr(1)O4 tetrahedra. In the third P site, P(3) is bonded to one O(3), one O(6), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. In the fourth P site, P(4) is bonded to one O(10), one O(11), one O(12), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(2) atom. In the second O site, O(6) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the third O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one P(3) atom. In the fourth O site, O(8) is bonded in a bent 120 degrees geometry to one P(2) and one P(4) atom. In the fifth O site, O(9) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the sixth O site, O(10) is bonded in a bent 150 degrees geometry to one P(1) and one P(4) atom. In the seventh O site, O(11) is bonded in a bent 150 degrees geometry to one Cr(2) and one P(4) atom. In the eighth O site, O(12) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(4) atom. In the ninth O site, O(1) is bonded in a bent 150 degrees geometry to one Cr(2) and one P(1) atom. In the tenth O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one P(2) atom. In the eleventh O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Cr(2) and one P(3) atom. In the twelfth O site, O(4) is bonded in a linear geometry to one Cr(2) and one P(1) atom. is represented by the CIF file [CIF]
data_Cr(PO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.684
_cell_length_b   5.684
_cell_length_c   16.511
_cell_angle_alpha   87.395
_cell_angle_beta   87.395
_cell_angle_gamma   89.884
_symmetry_Int_Tables_number   1
_cell_volume   532.409
_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
  Cr  Cr0  1  0.064  0.852  0.907  1.0
  Cr  Cr1  1  0.852  0.064  0.407  1.0
  Cr  Cr2  1  0.677  0.063  0.615  1.0
  Cr  Cr3  1  0.063  0.677  0.115  1.0
  P  P4  1  0.004  0.563  0.650  1.0
  P  P5  1  0.563  0.004  0.150  1.0
  P  P6  1  0.565  0.522  0.874  1.0
  P  P7  1  0.273  0.791  0.511  1.0
  P  P8  1  0.522  0.565  0.374  1.0
  P  P9  1  0.791  0.273  0.011  1.0
  P  P10  1  0.295  0.256  0.759  1.0
  P  P11  1  0.256  0.295  0.259  1.0
  O  O12  1  0.884  0.790  0.666  1.0
  O  O13  1  0.790  0.884  0.166  1.0
  O  O14  1  0.772  0.680  0.859  1.0
  O  O15  1  0.680  0.772  0.359  1.0
  O  O16  1  0.504  0.912  0.524  1.0
  O  O17  1  0.912  0.504  0.024  1.0
  O  O18  1  0.863  0.363  0.622  1.0
  O  O19  1  0.363  0.863  0.122  1.0
  O  O20  1  0.335  0.622  0.903  1.0
  O  O21  1  0.627  0.302  0.935  1.0
  O  O22  1  0.056  0.940  0.499  1.0
  O  O23  1  0.622  0.335  0.403  1.0
  O  O24  1  0.525  0.384  0.792  1.0
  O  O25  1  0.302  0.627  0.435  1.0
  O  O26  1  0.940  0.056  0.999  1.0
  O  O27  1  0.384  0.525  0.292  1.0
  O  O28  1  0.226  0.605  0.586  1.0
  O  O29  1  0.605  0.226  0.086  1.0
  O  O30  1  0.140  0.481  0.730  1.0
  O  O31  1  0.481  0.140  0.230  1.0
  O  O32  1  0.379  0.120  0.688  1.0
  O  O33  1  0.120  0.379  0.188  1.0
  O  O34  1  0.160  0.132  0.828  1.0
  O  O35  1  0.132  0.160  0.328  1.0
[/CIF]
.