temperature and pressure the dissociation pressure temperature for this compound are shown in the figure two large chunks of the compound lani 4 8 al 0 2 and weighing a total of 4 6029 gm were placed in a stainless steel reactor equipped with a 1 u03bc porous stainless steel filter disc the sample was then thoroughly degassed at room temperature and at 90 u00b0 c after cooling 144 8 mmoles of h were added to the reactor at a pressure of 742 psi within one hour the material had been activated absorbing 37 2 mmoles of h 2 this corresponds to the composition lani 4 8 al 0 2 h 6 9 this compares favorably with the hydrogen content of lani 5 h 6 7 and shows that hydrogen storage capacity is not impaired by the addition of aluminum furthermore the rate of the hydriding and dehydriding reactions are not impaired by the aluminum additions after this 34 activation 34 procedure the sample would then rapidly absorb and desorb hydrogen at the appropriate temperature and pressure the dissociation pressure temperature for this compound are shown in the figure it was found that not only was it possible to modify the decomposition pressure of the hydride for a given temperature but that this control of pressure was achieved.