NaCeP2O7 crystallizes in the orthorhombic Pnma space group. Na(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(5), and four equivalent O(2) atoms. Ce(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and four equivalent O(5) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(4), and two equivalent O(2) atoms to form corner-sharing PO4 tetrahedra. There are five inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(5) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Ce(1), and one P(1) atom. In the third O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Na(1), one Ce(1), and one P(2) atom. In the fourth O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Na(1), one Ce(1), and one P(2) atom. In the fifth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Na(1), two equivalent Ce(1), and one P(1) atom.
NaCeP2O7 crystallizes in the orthorhombic Pnma space group. Na(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(5), and four equivalent O(2) atoms. The Na(1)-O(3) bond length is 2.29 Å. Both Na(1)-O(1) bond lengths are 2.86 Å. Both Na(1)-O(5) bond lengths are 2.74 Å. There are two shorter (2.49 Å) and two longer (2.76 Å) Na(1)-O(2) bond lengths. Ce(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and four equivalent O(5) atoms. The Ce(1)-O(1) bond length is 2.37 Å. Both Ce(1)-O(2) bond lengths are 2.45 Å. Both Ce(1)-O(3) bond lengths are 2.90 Å. There are two shorter (2.53 Å) and two longer (2.64 Å) Ce(1)-O(5) bond lengths. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form corner-sharing PO4 tetrahedra. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(4) bond length is 1.62 Å. Both P(1)-O(5) bond lengths are 1.54 Å. In the second P site, P(2) is bonded to one O(1), one O(4), and two equivalent O(2) atoms to form corner-sharing PO4 tetrahedra. The P(2)-O(1) bond length is 1.52 Å. The P(2)-O(4) bond length is 1.63 Å. Both P(2)-O(2) bond lengths are 1.53 Å. There are five inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(5) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Ce(1), and one P(1) atom. In the third O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Na(1), one Ce(1), and one P(2) atom. In the fourth O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Na(1), one Ce(1), and one P(2) atom. In the fifth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Na(1), two equivalent Ce(1), and one P(1) atom.