CeSe2 is Low Tridymite-like structured and crystallizes in the orthorhombic Pbam space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to one Se(1), one Se(3), one Se(4), and one Se(5) atom to form corner-sharing CeSe4 tetrahedra. In the second Ce site, Ce(2) is bonded to one Se(2), one Se(3), one Se(4), and one Se(5) atom to form corner-sharing CeSe4 tetrahedra. There are five inequivalent Se sites. In the first Se site, Se(4) is bonded in a bent 150 degrees geometry to one Ce(1) and one Ce(2) atom. In the second Se site, Se(5) is bonded in a bent 150 degrees geometry to one Ce(1) and one Ce(2) atom. In the third Se site, Se(1) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms. In the fourth Se site, Se(2) is bonded in a bent 150 degrees geometry to two equivalent Ce(2) atoms. In the fifth Se site, Se(3) is bonded in a bent 150 degrees geometry to one Ce(1) and one Ce(2) atom.
CeSe2 is Low Tridymite-like structured and crystallizes in the orthorhombic Pbam space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to one Se(1), one Se(3), one Se(4), and one Se(5) atom to form corner-sharing CeSe4 tetrahedra. The Ce(1)-Se(1) bond length is 2.70 Å. The Ce(1)-Se(3) bond length is 2.70 Å. The Ce(1)-Se(4) bond length is 2.70 Å. The Ce(1)-Se(5) bond length is 2.70 Å. In the second Ce site, Ce(2) is bonded to one Se(2), one Se(3), one Se(4), and one Se(5) atom to form corner-sharing CeSe4 tetrahedra. The Ce(2)-Se(2) bond length is 2.70 Å. The Ce(2)-Se(3) bond length is 2.70 Å. The Ce(2)-Se(4) bond length is 2.70 Å. The Ce(2)-Se(5) bond length is 2.70 Å. There are five inequivalent Se sites. In the first Se site, Se(4) is bonded in a bent 150 degrees geometry to one Ce(1) and one Ce(2) atom. In the second Se site, Se(5) is bonded in a bent 150 degrees geometry to one Ce(1) and one Ce(2) atom. In the third Se site, Se(1) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms. In the fourth Se site, Se(2) is bonded in a bent 150 degrees geometry to two equivalent Ce(2) atoms. In the fifth Se site, Se(3) is bonded in a bent 150 degrees geometry to one Ce(1) and one Ce(2) atom.