Materials Data on Cu5Sn4 by Materials Project
Cu5Sn4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are five inequivalent Cu sites. In the first Cu site, Cu is bonded in a 10-coordinate geometry to four Cu and six Sn atoms. There are two shorter (2.59 Å) and two longer (2.64 Å) Cu–Cu bond lengths. There are a spread of Cu–Sn bond distances ranging from 2.68–2.96 Å. In the second Cu site, Cu is bonded in a distorted q6 geometry to four Cu and six Sn atoms. There are one shorter (2.55 Å) and two longer (2.76 Å) Cu–Cu bond lengths. There are a spread of Cu–Sn bond distances ranging from 2.74–2.91 Å. In the third Cu site, Cu is bonded in a distorted q6 geometry to three Cu and six Sn atoms. There are one shorter (2.59 Å) and one longer (2.62 Å) Cu–Cu bond lengths. There are a spread of Cu–Sn bond distances ranging from 2.70–2.82 Å. In the fourth Cu site, Cu is bonded in a distorted q6 geometry to three Cu and six Sn atoms. The Cu–Cu bond length is 2.66 Å. There are a spread of Cu–Sn bond distances ranging from 2.72–2.85 Å. In the fifth Cu site, Cu is bonded in a 11-coordinate geometry to six Cu and five Sn atoms. There are a spread of Cu–Sn bond distances ranging from 2.63–2.79 Å. There are four inequivalent Sn sites. In the first Sn site, Sn is bonded in a 7-coordinate geometry to seven Cu atoms. In the second Sn site, Sn is bonded in a 10-coordinate geometry to eight Cu atoms. In the third Sn site, Sn is bonded in a 7-coordinate geometry to seven Cu atoms. In the fourth Sn site, Sn is bonded in a 7-coordinate geometry to seven Cu atoms.