The structure, thermal properties and phase transformations of the cubic polymorph of magnesium tetrahydroborate†
Abstract
The structure of the cubic polymorph of magnesium tetrahydroborate (γ-Mg(BH4)2) has been determined in space group Iad from a structural database of the isoelectronic compound SiO2; this has been corroborated by DFT calculations. The structure is found to concur with that recently determined by Filinchuk et al. (Y. Filinchuk, B. Richter, T. R. Jensen, V. Dmitriev, D. Chernyshov and H. Hagemann, Angew. Chem. Int. Ed., 2011, DOI: 10.1002/anie.201100675). The phase transformations and subsequent