Materials Data on U3Al2Ge3 by Materials Project

Abstract

U3Al2Ge3 crystallizes in the tetragonal I4cm space group. The structure is three-dimensional. there are two inequivalent U sites. In the first U site, U is bonded in a 8-coordinate geometry to three equivalent Al and five Ge atoms. There are one shorter (3.09 Å) and two longer (3.10 Å) U–Al bond lengths. There are a spread of U–Ge bond distances ranging from 2.93–3.16 Å. In the second U site, U is bonded in a 6-coordinate geometry to four equivalent Al and six Ge atoms. All U–Al bond lengths are 3.14 Å. There are a spread of U–Ge bond distances ranging from 2.76–2.97 Å. Al is bonded in a 3-coordinate geometry to five U and three equivalent Ge atoms. There are two shorter (2.63 Å) and one longer (2.69 Å) Al–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to five U and three equivalent Al atoms. In the second Ge site, Ge is bonded to six U atoms to form corner-sharing GeU6 octahedra. The corner-sharing octahedra tilt angles range from 0–42°.