Materials Data on Ho3Sn7 by Materials Project

Abstract

HoSn4Ho2Sn3 crystallizes in the orthorhombic Cmmm space group. The structure is two-dimensional and consists of one Ho2Sn3 sheet oriented in the (0, 0, 1) direction and one HoSn4 sheet oriented in the (0, 0, 1) direction. In the Ho2Sn3 sheet, Ho is bonded in a distorted hexagonal planar geometry to four equivalent Ho and two equivalent Sn atoms. There are two shorter (3.01 Å) and two longer (3.39 Å) Ho–Ho bond lengths. Both Ho–Sn bond lengths are 3.19 Å. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a hexagonal planar geometry to six Sn atoms. There are two shorter (3.01 Å) and four longer (3.17 Å) Sn–Sn bond lengths. In the second Sn site, Sn is bonded in a distorted hexagonal planar geometry to two equivalent Ho and four Sn atoms. Both Sn–Sn bond lengths are 3.01 Å. In the HoSn4 sheet, Ho is bonded in a distorted hexagonal planar geometry to two equivalent Ho and four equivalent Sn atoms. Both Ho–Ho bond lengths are 3.01 Å. All Ho–Sn bond lengths are 3.18 Å. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a hexagonal planar geometry to six Sn atoms. There are a spread of Sn–Sn bond distances ranging from 3.01–3.34 Å. In the second Sn site, Sn is bonded in a distorted hexagonal planar geometry to two equivalent Ho and four Sn atoms. Both Sn–Sn bond lengths are 3.01 Å.