CeSe2 crystallizes in the trigonal P-31m space group. Ce(1) is bonded to one Se(1), one Se(2), one Se(3), and one Se(4) atom to form corner-sharing CeSe4 tetrahedra. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a water-like geometry to two equivalent Ce(1) atoms. In the second Se site, Se(2) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms. In the third Se site, Se(3) is bonded in a linear geometry to two equivalent Ce(1) atoms. In the fourth Se site, Se(4) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms.
CeSe2 crystallizes in the trigonal P-31m space group. Ce(1) is bonded to one Se(1), one Se(2), one Se(3), and one Se(4) atom to form corner-sharing CeSe4 tetrahedra. The Ce(1)-Se(1) bond length is 2.70 Å. The Ce(1)-Se(2) bond length is 2.71 Å. The Ce(1)-Se(3) bond length is 2.70 Å. The Ce(1)-Se(4) bond length is 2.71 Å. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a water-like geometry to two equivalent Ce(1) atoms. In the second Se site, Se(2) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms. In the third Se site, Se(3) is bonded in a linear geometry to two equivalent Ce(1) atoms. In the fourth Se site, Se(4) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms.