Materials Data on Sm2SiTeO4 by Materials Project

Abstract

Sm2SiTeO4 crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. there are two inequivalent Sm3+ sites. In the first Sm3+ site, Sm3+ is bonded in a 6-coordinate geometry to four equivalent Te2- and six O2- atoms. There are two shorter (3.31 Å) and two longer (3.69 Å) Sm–Te bond lengths. There are a spread of Sm–O bond distances ranging from 2.48–2.51 Å. In the second Sm3+ site, Sm3+ is bonded in a 6-coordinate geometry to three equivalent Te2- and six O2- atoms. There are a spread of Sm–Te bond distances ranging from 3.16–3.36 Å. There are a spread of Sm–O bond distances ranging from 2.46–2.62 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.65 Å) and two longer (1.67 Å) Si–O bond length. Te2- is bonded in a 1-coordinate geometry to seven Sm3+, two equivalent Te2-, and twelve O2- atoms. Both Te–Te bond lengths are 3.78 Å. There are a spread of Te–O bond distances ranging from 3.31–3.89 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Sm3+, one Si4+, and three equivalent Te2- atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Sm3+, one Si4+, and three equivalent Te2- atoms.