K2CrCPO7 crystallizes in the monoclinic P2_1/m space group. K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. Cr(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. P(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-39°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent K(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Cr(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted tetrahedral geometry to two equivalent K(1), one Cr(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent K(1), one Cr(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent K(1), one Cr(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Cr(1), and one P(1) atom.
K2CrCPO7 crystallizes in the monoclinic P2_1/m space group. K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. The K(1)-O(1) bond length is 2.63 Å. The K(1)-O(2) bond length is 2.62 Å. The K(1)-O(3) bond length is 2.54 Å. The K(1)-O(5) bond length is 2.77 Å. The K(1)-O(6) bond length is 3.02 Å. There is one shorter (2.82 Å) and one longer (3.12 Å) K(1)-O(4) bond length. Cr(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form CrO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra. The Cr(1)-O(2) bond length is 2.04 Å. The Cr(1)-O(3) bond length is 2.03 Å. The Cr(1)-O(5) bond length is 2.05 Å. The Cr(1)-O(6) bond length is 2.02 Å. Both Cr(1)-O(4) bond lengths are 2.09 Å. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.32 Å. The C(1)-O(3) bond length is 1.33 Å. P(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-39°. The P(1)-O(5) bond length is 1.56 Å. The P(1)-O(6) bond length is 1.57 Å. Both P(1)-O(4) bond lengths are 1.56 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent K(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Cr(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted tetrahedral geometry to two equivalent K(1), one Cr(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent K(1), one Cr(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent K(1), one Cr(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Cr(1), and one P(1) atom.