Materials Data on Ce4UC10 by Materials Project

Abstract

UCe4C10 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. U4+ is bonded in a distorted q4 geometry to ten C+1.60- atoms. There are two shorter (2.44 Å) and eight longer (2.64 Å) U–C bond lengths. There are two inequivalent Ce3+ sites. In the first Ce3+ site, Ce3+ is bonded in a 10-coordinate geometry to ten C+1.60- atoms. There are a spread of Ce–C bond distances ranging from 2.44–2.76 Å. In the second Ce3+ site, Ce3+ is bonded in a 10-coordinate geometry to ten C+1.60- atoms. There are a spread of Ce–C bond distances ranging from 2.47–2.77 Å. There are three inequivalent C+1.60- sites. In the first C+1.60- site, C+1.60- is bonded in a 2-coordinate geometry to two equivalent U4+, three Ce3+, and one C+1.60- atom. The C–C bond length is 1.34 Å. In the second C+1.60- site, C+1.60- is bonded in a 2-coordinate geometry to five Ce3+ and one C+1.60- atom. The C–C bond length is 1.30 Å. In the third C+1.60- site, C+1.60- is bonded in a 6-coordinate geometry to one U4+, four equivalent Ce3+, and one C+1.60- atom. The C–C bond length is 1.36 Å.