Materials Data on ThCu5Sn by Materials Project
ThCu5Sn crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Th is bonded in a 6-coordinate geometry to fifteen Cu and four equivalent Sn atoms. There are a spread of Th–Cu bond distances ranging from 2.88–3.34 Å. There are a spread of Th–Sn bond distances ranging from 3.31–3.42 Å. There are four inequivalent Cu sites. In the first Cu site, Cu is bonded to three equivalent Th, seven Cu, and two equivalent Sn atoms to form a mixture of corner, edge, and face-sharing CuTh3Cu7Sn2 cuboctahedra. There are a spread of Cu–Cu bond distances ranging from 2.51–2.55 Å. There are one shorter (2.78 Å) and one longer (2.80 Å) Cu–Sn bond lengths. In the second Cu site, Cu is bonded in a 11-coordinate geometry to three equivalent Th, five Cu, and three equivalent Sn atoms. There are two shorter (2.59 Å) and one longer (3.07 Å) Cu–Cu bond lengths. There are one shorter (2.65 Å) and two longer (3.08 Å) Cu–Sn bond lengths. In the third Cu site, Cu is bonded to three equivalent Th, seven Cu, and two equivalent Sn atoms to form a mixture of corner, edge, and face-sharing CuTh3Cu7Sn2 cuboctahedra. The Cu–Cu bond length is 2.54 Å. Both Cu–Sn bond lengths are 2.83 Å. In the fourth Cu site, Cu is bonded in a 12-coordinate geometry to three equivalent Th, eight Cu, and one Sn atom. Both Cu–Cu bond lengths are 2.91 Å. The Cu–Sn bond length is 2.86 Å. Sn is bonded in a 1-coordinate geometry to four equivalent Th and ten Cu atoms.