CeSe2 crystallizes in the orthorhombic Pcca 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 bent 120 degrees geometry to two equivalent Ce(1) atoms. In the second Se site, Se(2) is bonded in a bent 120 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 120 degrees geometry to two equivalent Ce(1) atoms.
CeSe2 crystallizes in the orthorhombic Pcca 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 2.71 Å. The Ce(1)-Se(2) bond length is 2.72 Å. The Ce(1)-Se(3) bond length is 2.73 Å. The Ce(1)-Se(4) bond length is 2.73 Å. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a bent 120 degrees geometry to two equivalent Ce(1) atoms. In the second Se site, Se(2) is bonded in a bent 120 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 120 degrees geometry to two equivalent Ce(1) atoms.