Noun.  (mineralogy) A mineral with tetragonal crystals, of the autunite group, Cu2+(UO2)2(AsO4)2ยท4H2O.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.