HYDRIDOALUMINATES OF ALKALINE METALS.

Article abstract of DOI:10.1016/0022-5088(87)90051-8

Compounds with general formula MAlH//4, M//3AlH//6, M//2M prime AlH//6 (M, M prime EQUVLNT Li, Na, K) have been studied for several years in the authors' laboratory, especially from a fundamental point of view. The authors present an overall picture of our research work concerning preparation, thermodynamic and structural properties of these complex hydrides. Thermodynamic properties were investigated by calorimetric measurements. The authors also performed thermogravimetric analysis and differential scanning calorimetry studies with special attention to phase transformations. Except for Li//3AlH//6, the hexahydridoaluminates crystallize with a cryolite (Na//3AlF//6) or elpasolite (K//2NaAlF//6) structure, generally pseudocubic.