CeSe2 crystallizes in the trigonal R-3 space group. Ce(1) is bonded in a 5-coordinate geometry to one Se(1), one Se(3), and three equivalent Se(2) atoms. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a linear geometry to two equivalent Ce(1) atoms. In the second Se site, Se(3) is bonded in a linear geometry to two equivalent Ce(1) atoms. In the third Se site, Se(2) is bonded in a trigonal planar geometry to three equivalent Ce(1) atoms.
CeSe2 crystallizes in the trigonal R-3 space group. Ce(1) is bonded in a 5-coordinate geometry to one Se(1), one Se(3), and three equivalent Se(2) atoms. The Ce(1)-Se(1) bond length is 2.80 Å. The Ce(1)-Se(3) bond length is 2.75 Å. There are a spread of Ce(1)-Se(2) bond distances ranging from 2.83-2.90 Å. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a linear geometry to two equivalent Ce(1) atoms. In the second Se site, Se(3) is bonded in a linear geometry to two equivalent Ce(1) atoms. In the third Se site, Se(2) is bonded in a trigonal planar geometry to three equivalent Ce(1) atoms.