Ammonium dodecamolybdomolybdate and method of making

摘要

A novel molybdenum compound, ammonium dodecamolybdomolybdate (AMM), is described which may be used in the manufacture of molybdenum metal and molybdenum carbide powders. The molybdenum compound is a dodecaheteropoly acid salt having a Keggin-type structure wherein molybdenum resides in both the hetero as well as peripheral atomic positions. The novel compound has the general formula (NH₄)₂Mo₁₂MoO₄₀.6H₂O. Because of its low solubility, the compound can be crystallized efficiently and at a high purity from ammonium molybdate solutions.