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Autunite

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11922000Autunite is a uranium-rich greenish yellow secondary mineral. It is the result of the alteration of uraninite.Autunite is a uranium-rich greenish yellow secondary mineral. It is the result of the alteration of...Zoom http://www.museum-lehavre.fr/sites/default/files/styles/exposition/public/multimedia/autunite_228.jpg?itok=ks0g4tF_

Autunite

 

  • Donor / collector : Le Havre Museum of Natural History

  • Category : uranium phosphate

  • Origin : La Fraisse, Haute-Vienne

  • Dimensions : 9 cm x 8 cm

Formerly known as calcium uranium phosphate, autunite got its name from Brooke and Miller in 1852, after the locality of Autun, which supplied the specimens discovered by De Champeaux and Haüy in 1760.

Autunite is a uranium-rich greenish yellow secondary mineral. It is the result of the alteration ofuraninite (aka pitchblende).

Autunite can be found abundantly in French deposits, and it has been used for uranium mining, especially in Haute-Vienne and Puy-de-Dôme.

 


Secondary minerals : minerals formed by the chemical alteration of minerals evolved earlier (primary minerals). Oxidation reactions happening close to ground level, above ground water, often result in the formation of secondary minerals. Here, the alteration of uraninite results in the formation of autunite.

Uraninite : uranium-rich mineral and ore

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