Autunite is a mineral that is classified as a hydrated calcium uranyl phosphate. Its name comes from its discovery near the French town of Autun. The word is pronounced as /ɔːˈtjuːnaɪt/, with the stress falling on the second syllable. The spelling of Autunite is derived from the French town of Autun, where it was first discovered. Its spelling is clear and easy to remember, making it an important word for those studying mineralogy and geology.
Autunite is a mineral that belongs to the phosphate mineral group. It is a hydrated calcium uranium phosphate, with the chemical formula Ca(UO2)2(PO4)2·10-12H2O. This mineral is usually found in the form of small, square or rectangular crystals that can vary in color from yellow to olive-green, and occasionally even bright green. The name "autunite" originates from Autun, France, where the mineral was first discovered in the early 19th century.
Being a uranium mineral, autunite is known for its radioactivity and fluorescence when exposed to ultraviolet light. It has a moderate to high specific gravity and a vitreous to pearly luster. Autunite is typically found in granite pegmatites and other phosphate-rich rocks, often occurring alongside other uranium-bearing minerals.
From a practical standpoint, autunite has been utilized in uranium mining for its economic value as a uranium ore. Extracting uranium from autunite has contributed to the production of nuclear fuel and various industrial applications. However, due to the radioactivity associated with this mineral, it requires careful handling and disposal to prevent any potential hazards to human health and the environment.
In addition to its utility in the nuclear industry, autunite is also collected by mineral enthusiasts for its aesthetic value. The bright, fluorescent colors and unique crystal formations make autunite a sought-after mineral specimen among collectors and museums worldwide.
The word "Autunite" derives from the name of its original discovery site, the Autun region in France. Autun is a historic town located in the Burgundy region of France. The mineral was first discovered there in the early 19th century by a French pharmacist and mineralogist named René Just Haüy. The name "Autunite" was derived by adding the suffix "-ite" (commonly used to name minerals) to "Autun", thus recognizing the place where it was found.