The effect of high-pressure (6 gigapascal) and heating (600°C) the hydrogen source of LiAlHL4 on the structural and hydrogenation properties of 0.9MgH2+0.1Al+0.9Ni+0.1VH0.9 was investigated. After recovery to ambient conditions, the sample was analyzed using X-ray diffraction, differential scanning calorimetry, thermogravimetry and differential thermal analyses. The results reveal that a nominal hydride phase with the composition of Mg0.90Al0.08Ni0.94V0.08H1.6 can be obtained, in which a maximum H2-uptake can reach 1.9wt.%, with hydride decomposition occurring between 160°C and 250°C.