Examples from the Web for alumina
Clay, to be precise, is a silicate of alumina, a term which is interesting when it is explained.The Romance of War Inventions|Thomas W. Corbin
Can we then use "red liquor" (acetate of alumina), acetate of iron, copperas, etc.?The Chemistry of Hat Manufacturing|Watson Smith
This being the case, it is not surprising that repeated attempts have been made to effect the crystallization of alumina.
The mordant for a full red may be acetate of alumina, of spec.A Dictionary of Arts, Manufactures and Mines|Andrew Ure
Brunswick Green, originally a crude chloride of copper, is now generally a mixture of carbonate of copper and chalk or alumina.Poisons: Their Effects and Detection|Alexander Wynter Blyth