| http://www.w3.org/ns/prov#value | - After the starting ingredients have been combined to form a solution or slurry (with or without the aid of a dispersant, such as citric acid), it is dried and the recovered solid is then heated in the presence of a nonreducing gas, such as air, nitrogen, nitric oxide, etc., at a temperature between about 400??? and about 1000??? C. After the dried slurry has been calcined, the resulting product is
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