Materials Data on Sm3Si2ClO8 by Materials Project
Sm3Si2O8Cl crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Sm3+ sites. In the first Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to seven O2- and one Cl1- atom. There are a spread of Sm–O bond distances ranging from 2.30–2.71 Å. The Sm–Cl bond length is 2.99 Å. In the second Sm3+ site, Sm3+ is bonded in a 8-coordinate geometry to six O2- and two equivalent Cl1- atoms. There are four shorter (2.40 Å) and two longer (2.57 Å) Sm–O bond lengths. There are one shorter (2.85 Å) and one longer (2.97 Å) Sm–Cl bond lengths. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–1.68 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Sm3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Sm3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Sm3+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Sm3+ and one Si4+ atom. Cl1- is bonded in a distorted square co-planar geometry to four Sm3+ atoms.