Materials Data on CeSe2 by Materials Project

CeSe2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ce4+ is bonded in a 9-coordinate geometry to nine Se2- atoms. There are a spread of Ce–Se bond distances ranging from 3.05–3.10 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded to five equivalent Ce4+ atoms to form a mixture of distorted edge and corner-sharing SeCe5 trigonal bipyramids. In the second Se2- site, Se2- is bonded in a 4-coordinate geometry to four equivalent Ce4+ atoms.