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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]
au•tun•ite(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]