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AUTUNITE (Hydrated Calcium Uranyl Phosphate) (395 words) |
 | Autunite is one of the more attractive and popular radioactive minerals. |
| Autunite is probably the most popular uranium mineral for collectors. |
| Autunite can lose water and convert to a different mineral called meta-autunite-I of the meta-autunite/meta-torbernite group of minerals and with heating can produce a meta-autunite-II mineral. |
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Autunite: Daybreak mine, Spokane County, Washington Rocks & Minerals - Find Articles (758 words) |
| Autunite is now known to be orthorhombic (mmm), pseudotetragonal, occurring typically as thin plate-like or flaky crystals that are tabular on {010}, displaying rectangular or octagonal outlines. |
| Autunite is quite widespread as a secondary mineral formed by the near-surface oxidization of primary uranium-bearing minerals in such diverse occurrences as granitic pegmatites, hydrothermal veins, felsic plutons including those of granite and quartz-monzonite composition, and roll-front and other sediment-hosted uranium deposits. |
| Autunite is widespread in the eastern United States and is particularly well known as an accessory in complex pegmatites that have been prospected for mica, feldspar, spodumene, and gems. |
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