Materials Data on ThUB8 by Materials Project
UThB8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. U is bonded in a 12-coordinate geometry to eighteen B atoms. There are a spread of U–B bond distances ranging from 2.70–3.03 Å. Th is bonded in a 8-coordinate geometry to eighteen B atoms. There are a spread of Th–B bond distances ranging from 2.75–3.01 Å. There are five inequivalent B sites. In the first B site, B is bonded in a 1-coordinate geometry to two equivalent U, two equivalent Th, and five B atoms. There are a spread of B–B bond distances ranging from 1.62–1.78 Å. In the second B site, B is bonded in a 9-coordinate geometry to two equivalent U, two equivalent Th, and five B atoms. There are a spread of B–B bond distances ranging from 1.70–1.88 Å. In the third B site, B is bonded in a 9-coordinate geometry to two equivalent U, two equivalent Th, and five B atoms. The B–B bond length is 1.72 Å. In the fourth B site, B is bonded in a distorted trigonal planar geometry to four equivalent U, two equivalent Th, and three B atoms. The B–B bond length is 1.76 Å. In the fifth B site, B is bonded in a 3-coordinate geometry to two equivalent U, four equivalent Th, and three B atoms. The B–B bond length is 1.81 Å.