Crystallizing solution and method of preparation thereof

A process for preparing an aluminum hydride crystallizing liquid comprising:

• a. providing a nucleating liquid comprising aluminum hydride and lithium aluminum hydride carried in a mixture of an inert organic liquid with a boiling point greater than about 60.degree. C. and an aliphatic ether having a lower boiling point than the inert organic liquid, said aluminum hydride and lithium aluminum hydride being present in sufficient quantities so that the concentration of aluminum hydride in the nucleating liquid is within the range of about 0.05 to about 1 molar, and the aluminum hydride/lithium aluminum hydride mole ratio is within the range from about 2 to about 10, said ether being present in a sufficient amount to maintain the aluminum hydride in solution,
• b. providing a bath or organic liquid heated to a volatilization temperature,
• c. introducing said nucleating liquid into said heated organic liquid thereby to form a pre-crystallizing bath while maintaining the temperature of the pre-crystallizing bath at or above said volatilizing temperature, and
• d. continuing to introduce said nucleating liquid into the pre-crystallizing bath and maintaining the temperature of the bath at or above the volatilization temperature until crystals of aluminum hydride form in the pre-crystallizing bath.