Materials Data on Sn3BF9 by Materials Project
BF4Sn3F5 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of four BF4 clusters and one Sn3F5 sheet oriented in the (1, 0, 0) direction. In each BF4 cluster, B3+ is bonded in a tetrahedral geometry to four F1- atoms. There are a spread of B–F bond distances ranging from 1.40–1.43 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one B3+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one B3+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one B3+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one B3+ atom. In the Sn3F5 sheet, there are three inequivalent Sn2+ sites. In the first Sn2+ site, Sn2+ is bonded in a 3-coordinate geometry to three F1- atoms. There are a spread of Sn–F bond distances ranging from 2.10–2.21 Å. In the second Sn2+ site, Sn2+ is bonded in a distorted T-shaped geometry to three F1- atoms. There are a spread of Sn–F bond distances ranging from 2.15–2.24 Å. In the third Sn2+ site, Sn2+ is bonded in a 4-coordinate geometry to four F1- atoms. There are a spread of Sn–F bond distances ranging from 2.19–2.43 Å. There are five inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two Sn2+ atoms. In the second F1- site, F1- is bonded in a distorted bent 120 degrees geometry to two Sn2+ atoms. In the third F1- site, F1- is bonded in a distorted bent 120 degrees geometry to two Sn2+ atoms. In the fourth F1- site, F1- is bonded in a bent 120 degrees geometry to two Sn2+ atoms. In the fifth F1- site, F1- is bonded in a bent 150 degrees geometry to two Sn2+ atoms.