Materials Data on Pr2(CuSn2)3 by Materials Project
Pr2(CuSn2)3 crystallizes in the tetragonal I4mm space group. The structure is three-dimensional. there are two inequivalent Pr sites. In the first Pr site, Pr is bonded to four equivalent Cu and eight Sn atoms to form a mixture of corner and face-sharing PrCu4Sn8 cuboctahedra. All Pr–Cu bond lengths are 3.27 Å. There are four shorter (3.30 Å) and four longer (3.36 Å) Pr–Sn bond lengths. In the second Pr site, Pr is bonded in a 12-coordinate geometry to eight Cu and eight Sn atoms. There are four shorter (3.40 Å) and four longer (3.43 Å) Pr–Cu bond lengths. There are four shorter (3.39 Å) and four longer (3.54 Å) Pr–Sn bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu is bonded in a 12-coordinate geometry to four Pr and four Sn atoms. There are two shorter (2.62 Å) and two longer (2.69 Å) Cu–Sn bond lengths. In the second Cu site, Cu is bonded in a 9-coordinate geometry to four equivalent Pr and five Sn atoms. There are one shorter (2.52 Å) and four longer (2.65 Å) Cu–Sn bond lengths. There are four inequivalent Sn sites. In the first Sn site, Sn is bonded in a 2-coordinate geometry to two equivalent Pr, two equivalent Cu, and five Sn atoms. There are one shorter (2.93 Å) and four longer (3.17 Å) Sn–Sn bond lengths. In the second Sn site, Sn is bonded in a 7-coordinate geometry to two equivalent Pr and five Sn atoms. All Sn–Sn bond lengths are 3.17 Å. In the third Sn site, Sn is bonded in a 9-coordinate geometry to four equivalent Pr and five Cu atoms. In the fourth Sn site, Sn is bonded in a 8-coordinate geometry to four equivalent Pr and four equivalent Cu atoms.