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 (ō-tŭn′īt′, ô′tə-nīt)
A yellowish, fluorescent minor ore of uranium with the composition Ca(UO2)2(PO4)2·10-12H2O.

[After Autun, a city of east-central France.]


(Minerals) a yellowish fluorescent radioactive mineral consisting of a hydrated calcium uranium phosphate in tetragonal crystalline form. It is found in uranium ores. Formula: Ca(UO2)2(PO4)2.10–12H2O
[C19: named after Autun in France, one of the places where it was found, + -ite1]


(ˈɔt nˌaɪt, oʊˈtʌn aɪt)

a yellow mineral, a hydrous calcium uranium phosphate, CaU2P2O12∙8H2O, a minor ore of uranium.
[1850–55; after Autun, city in E France near source of supply; see -ite1]
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References in periodicals archive ?
2) uranium occurs as the U-phosphate minerals torbenite, autunite, and Pb-metaautunite (MacDonald 2001).
The other type of uranium occurrence occurs on the Autunite - October Prospects where the mineralization occurs along vertical fractures and/or shear zones in the quartz monzonite.
The property contains significant outcrops of the uranium mineral autunite in small fractures in many areas.