K2CBiPO7 crystallizes in the monoclinic P2_1/m space group. K(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. Bi(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form distorted BiO6 pentagonal pyramids that share corners with four equivalent P(1)O4 tetrahedra. 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 Bi(1)O6 pentagonal pyramids. 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 C(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one C(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one Bi(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Bi(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1), one Bi(1), and one P(1) atom.
K2CBiPO7 crystallizes in the monoclinic P2_1/m space group. K(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The K(1)-O(1) bond length is 2.61 Å. The K(1)-O(2) bond length is 2.72 Å. The K(1)-O(3) bond length is 2.67 Å. The K(1)-O(4) bond length is 3.01 Å. The K(1)-O(5) bond length is 2.85 Å. The K(1)-O(6) bond length is 2.81 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 1.25 Å. The C(1)-O(2) bond length is 1.34 Å. The C(1)-O(3) bond length is 1.32 Å. Bi(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form distorted BiO6 pentagonal pyramids that share corners with four equivalent P(1)O4 tetrahedra. The Bi(1)-O(2) bond length is 2.28 Å. The Bi(1)-O(3) bond length is 2.42 Å. The Bi(1)-O(5) bond length is 2.32 Å. The Bi(1)-O(6) bond length is 2.54 Å. Both Bi(1)-O(4) bond lengths are 2.41 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 Bi(1)O6 pentagonal pyramids. The P(1)-O(5) bond length is 1.58 Å. The P(1)-O(6) bond length is 1.55 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 C(1), and one Bi(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one C(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one Bi(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Bi(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1), one Bi(1), and one P(1) atom.