- a mineral, a hydrous sulfate of potassium and aluminum, KAl3(SO4)2(OH)6, commonly occurring in fine-grained masses.
Origin of alunite
Also called al·um·stone [al-uh m-stohn] /ˈæl əmˌstoʊn/.
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Examples from the Web for alunite
Of other natural mineral sources, alunite is the most important.
One of the interesting features of this occurrence is the abundance of alunite.
Alunite, al′un-īt, n. a mineral consisting of common alum together with normal hydrate of aluminium.
In the Goldfield camp (p. 230) the ores are closely associated with alunite in such a manner as to suggest a common origin.
Alunite is a potassium-aluminum sulphate, which differs from sericite in that sulphur takes the place of silicon.
- a white, grey, or reddish mineral consisting of hydrated aluminium sulphate. It occurs in volcanic igneous rocks and is a source of potassium and aluminium compounds. Formula: KAl 3 (SO 4) 2 (OH) 6
C19: from French alun alum (from Latin alūmen) + -ite 1
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