Materials Data on BaMgH4 by Materials Project
BaMgH4 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Ba2+ is bonded in a 9-coordinate geometry to nine H1- atoms. There are a spread of Ba–H bond distances ranging from 2.67–3.01 Å. Mg2+ is bonded to six H1- atoms to form corner-sharing MgH6 octahedra. The corner-sharing octahedra tilt angles range from 0–10°. There are a spread of Mg–H bond distances ranging from 1.89–2.11 Å. There are three inequivalent H1- sites. In the first H1- site, H1- is bonded in a distorted single-bond geometry to three equivalent Ba2+ and one Mg2+ atom. In the second H1- site, H1- is bonded in a distorted linear geometry to three equivalent Ba2+ and two equivalent Mg2+ atoms. In the third H1- site, H1- is bonded in a linear geometry to two equivalent Mg2+ atoms.