Materials Data on Tb3Sn7 by Materials Project
Tb3Sn7 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. there are two inequivalent Tb sites. In the first Tb site, Tb is bonded to twelve Sn atoms to form a mixture of corner and face-sharing TbSn12 cuboctahedra. There are four shorter (3.18 Å) and eight longer (3.37 Å) Tb–Sn bond lengths. In the second Tb site, Tb is bonded in a 10-coordinate geometry to ten Sn atoms. There are a spread of Tb–Sn bond distances ranging from 3.24–3.45 Å. There are four inequivalent Sn sites. In the first Sn site, Sn is bonded in a square co-planar geometry to four equivalent Tb and eight Sn atoms. All Sn–Sn bond lengths are 3.37 Å. In the second Sn site, Sn is bonded in a 10-coordinate geometry to four Tb and six Sn atoms. All Sn–Sn bond lengths are 3.18 Å. In the third Sn site, Sn is bonded in a 10-coordinate geometry to four Tb and six Sn atoms. In the fourth Sn site, Sn is bonded in a 8-coordinate geometry to six equivalent Tb and two equivalent Sn atoms. Both Sn–Sn bond lengths are 3.02 Å.