Materials Data on U6Al43Mo4 by Materials Project

Abstract

U6Mo4Al43 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. U is bonded in a 8-coordinate geometry to one U, one Mo, and fifteen Al atoms. The U–U bond length is 3.13 Å. The U–Mo bond length is 3.64 Å. There are a spread of U–Al bond distances ranging from 3.05–3.50 Å. There are two inequivalent Mo sites. In the first Mo site, Mo is bonded in a distorted q6 geometry to two equivalent U and ten Al atoms. There are a spread of Mo–Al bond distances ranging from 2.58–2.71 Å. In the second Mo site, Mo is bonded in a cuboctahedral geometry to twelve Al atoms. There are six shorter (2.68 Å) and six longer (2.86 Å) Mo–Al bond lengths. There are seven inequivalent Al sites. In the first Al site, Al is bonded in a 2-coordinate geometry to one U, two Mo, and three equivalent Al atoms. There are one shorter (2.73 Å) and two longer (2.87 Å) Al–Al bond lengths. In the second Al site, Al is bonded in a 12-coordinate geometry to four equivalent U and eight Al atoms. There are a spread of Al–Al bond distances ranging from 2.73–3.04 Å. In the third Al site, Al is bonded in a 1-coordinate geometry to two equivalent U, one Mo, and three Al atoms. There are one shorter (2.70 Å) and one longer (2.87 Å) Al–Al bond lengths. In the fourth Al site, Al is bonded in a distorted linear geometry to two equivalent Mo atoms. In the fifth Al site, Al is bonded in a 12-coordinate geometry to two equivalent U, one Mo, and nine Al atoms. Both Al–Al bond lengths are 3.00 Å. In the sixth Al site, Al is bonded to three equivalent U and nine Al atoms to form a mixture of corner and face-sharing AlU3Al9 cuboctahedra. All Al–Al bond lengths are 2.82 Å. In the seventh Al site, Al is bonded in a distorted single-bond geometry to two equivalent U, one Mo, and two equivalent Al atoms.