CeLa(O2F)2 crystallizes in the hexagonal P-6m2 space group. Ce(1) is bonded in a 9-coordinate geometry to six equivalent O(2) and three equivalent F(1) atoms. La(1) is bonded in a 9-coordinate geometry to six equivalent O(1) and three equivalent F(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent La(1) and one O(2) atom to form a mixture of distorted face and corner-sharing OLa3O trigonal pyramids. In the second O site, O(2) is bonded to three equivalent Ce(1) and one O(1) atom to form a mixture of distorted face and corner-sharing OCe3O tetrahedra. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal planar geometry to three equivalent Ce(1) atoms. In the second F site, F(2) is bonded in a trigonal planar geometry to three equivalent La(1) atoms.
CeLa(O2F)2 crystallizes in the hexagonal P-6m2 space group. Ce(1) is bonded in a 9-coordinate geometry to six equivalent O(2) and three equivalent F(1) atoms. All Ce(1)-O(2) bond lengths are 2.65 Å. All Ce(1)-F(1) bond lengths are 2.32 Å. La(1) is bonded in a 9-coordinate geometry to six equivalent O(1) and three equivalent F(2) atoms. All La(1)-O(1) bond lengths are 2.69 Å. All La(1)-F(2) bond lengths are 2.32 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent La(1) and one O(2) atom to form a mixture of distorted face and corner-sharing OLa3O trigonal pyramids. The O(1)-O(2) bond length is 1.52 Å. In the second O site, O(2) is bonded to three equivalent Ce(1) and one O(1) atom to form a mixture of distorted face and corner-sharing OCe3O tetrahedra. There are two inequivalent F sites. In the first F site, F(1) is bonded in a trigonal planar geometry to three equivalent Ce(1) atoms. In the second F site, F(2) is bonded in a trigonal planar geometry to three equivalent La(1) atoms.