KPrCPO7 crystallizes in the monoclinic P2_1 space group. K(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom. Pr(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form distorted PrO6 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(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with four equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-46°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one Pr(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one Pr(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Pr(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one K(1), one Pr(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(1), one Pr(1), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one Pr(1), and one P(1) atom.
KPrCPO7 crystallizes in the monoclinic P2_1 space group. K(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom. The K(1)-O(1) bond length is 2.64 Å. The K(1)-O(2) bond length is 2.88 Å. The K(1)-O(3) bond length is 2.81 Å. The K(1)-O(5) bond length is 2.93 Å. The K(1)-O(6) bond length is 3.14 Å. The K(1)-O(7) bond length is 2.86 Å. Pr(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form distorted PrO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra. The Pr(1)-O(2) bond length is 2.67 Å. The Pr(1)-O(3) bond length is 2.56 Å. The Pr(1)-O(4) bond length is 2.31 Å. The Pr(1)-O(5) bond length is 2.40 Å. The Pr(1)-O(6) bond length is 2.31 Å. The Pr(1)-O(7) bond length is 2.30 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 1.27 Å. The C(1)-O(2) bond length is 1.29 Å. The C(1)-O(3) bond length is 1.29 Å. P(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with four equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 37-46°. The P(1)-O(4) bond length is 1.54 Å. The P(1)-O(5) bond length is 1.55 Å. The P(1)-O(6) bond length is 1.57 Å. The P(1)-O(7) bond length is 1.56 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one Pr(1), and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one Pr(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Pr(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one K(1), one Pr(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(1), one Pr(1), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one Pr(1), and one P(1) atom.