Rare Mineral Seligmannite: Discovery, Properties, and Significance

Seligmannite is a rare mineral, with the chemical formula of Ca3(PO4)2. It is a member of the phosphate family and is found in the oxidized zone of uranium deposits. It was first discovered in 1956 by Dr. H. Seligmann, a German geologist, in the former German Democratic Republic (GDR). The mineral is named after its discoverer.

Seligmannite is a soft, yellowish-white to pale green mineral with a vitreous luster. It has a hexagonal crystal structure and can be found in both massive and fibrous forms. It is soluble in acid and reacts with hydrochloric acid to form calcium chloride and phosphoric acid.

Seligmannite is a rare mineral that is not well known, even among mineral collectors. It is not commonly found in commercial mines, and most specimens are found in small quantities in the oxidized zones of uranium deposits. As such, it is considered a rare and unique mineral that is highly sought after by collectors and scientists.