kalunite


kalunite:

see alumalum
, any one of a series of isomorphous double salts that are hydrated sulfates of a univalent cation (e.g., potassium, sodium, ammonium, cesium, or thallium) and a trivalent cation (e.g., aluminum, chromium, iron, manganese, cobalt, or titanium).
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kalunite

[′kal·ə‚nīt] (mineralogy) The naturally occurring form of alum.