Materials Data on H6W by Materials Project
(WH5)2H2 crystallizes in the monoclinic C2/m space group. The structure is two-dimensional and consists of two hydrogen molecules and one WH5 sheet oriented in the (0, 0, 1) direction. In the WH5 sheet, W2+ is bonded in a 10-coordinate geometry to ten H+0.33- atoms. There are a spread of W–H bond distances ranging from 1.68–2.05 Å. There are five inequivalent H+0.33- sites. In the first H+0.33- site, H+0.33- is bonded in a bent 120 degrees geometry to two equivalent W2+ atoms. In the second H+0.33- site, H+0.33- is bonded in a water-like geometry to two equivalent W2+ atoms. In the third H+0.33- site, H+0.33- is bonded in a water-like geometry to two equivalent W2+ atoms. In the fourth H+0.33- site, H+0.33- is bonded in a single-bond geometry to one W2+ atom. In the fifth H+0.33- site, H+0.33- is bonded in a 3-coordinate geometry to three equivalent W2+ atoms.