K2Ce(PO4)2 crystallizes in the tetragonal I4_1/amd space group. K(1) is bonded in a 4-coordinate geometry to four equivalent O(2) atoms. Ce(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. P(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ce(1), and one P(1) atom.
K2Ce(PO4)2 crystallizes in the tetragonal I4_1/amd space group. K(1) is bonded in a 4-coordinate geometry to four equivalent O(2) atoms. All K(1)-O(2) bond lengths are 2.78 Å. Ce(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. All Ce(1)-O(1) bond lengths are 2.24 Å. All Ce(1)-O(2) bond lengths are 2.51 Å. P(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both P(1)-O(1) bond lengths are 1.53 Å. Both P(1)-O(2) bond lengths are 1.53 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ce(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), one Ce(1), and one P(1) atom.