Vocabulary : Alum to Alumine
Alum : A double sulphate formed of aluminium and some other element (esp. an alkali metal) or of aluminium. It has twenty-four molecules of water of crystallization. ;; To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.Alum root : A North American herb (Heuchera Americana) of the Saxifrage family, whose root has astringent properties.
Alum schist : Alt. of Alum shale
Alum shale : A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock.
Alum stone : A subsulphate of alumina and potash; alunite.
