[{"from": "human", "value": "Describe this molecule. [H-1].[H-1].[H-1].[H-1].[Li+1].[Al+3]"}, {"from": "gpt", "value": "The molecule appears as a white powder that turns gray on standing. If spread out over a large flat combustible surface, friction can cause ignition. Used to make other chemicals, as a polymerization catalyst, as a hydrogen source, and as a propellant."}]