Materials Data on Zn(BH4)2 by Materials Project
Zn(BH4)2 crystallizes in the orthorhombic Pmc2_1 space group. The structure is two-dimensional and consists of one Zn(BH4)2 sheet oriented in the (0, 1, 0) direction. Zn2+ is bonded in a 6-coordinate geometry to eight H+0.50+ atoms. There are a spread of Zn–H bond distances ranging from 1.88–2.22 Å. There are two inequivalent B3- sites. In the first B3- site, B3- is bonded in a tetrahedral geometry to four H+0.50+ atoms. There are a spread of B–H bond distances ranging from 1.19–1.26 Å. In the second B3- site, B3- is bonded in a tetrahedral geometry to four H+0.50+ atoms. There are a spread of B–H bond distances ranging from 1.22–1.24 Å. There are six inequivalent H+0.50+ sites. In the first H+0.50+ site, H+0.50+ is bonded in a single-bond geometry to two equivalent Zn2+ and one B3- atom. In the second H+0.50+ site, H+0.50+ is bonded in a water-like geometry to one Zn2+ and one B3- atom. In the third H+0.50+ site, H+0.50+ is bonded in a distorted L-shaped geometry to one Zn2+ and one B3- atom. In the fourth H+0.50+ site, H+0.50+ is bonded in a distorted L-shaped geometry to one Zn2+ and one B3- atom. In the fifth H+0.50+ site, H+0.50+ is bonded in an L-shaped geometry to one Zn2+ and one B3- atom. In the sixth H+0.50+ site, H+0.50+ is bonded in a single-bond geometry to one B3- atom.