Uranopilite
1 in the gallery
Uranopilite is a hydrated uranyl sulfate mineral that forms as crystalline aggregates with a distinctive yellow to greenish hue. It typically occurs as plate-like to prismatic crystals and may display a vitreous to dull luster under reflected light. The mineral’s composition includes uranium in the uranyl ion, sulfate groups, oxygen, hydrogen, and water of crystallization, contributing to its characteristic stability as a hydrated phase in oxidizing environments.
- Formula
- (UO2)6(SO4)O2(OH)6 · 14H2O
Where Uranopilite is found
Top localities
- Johanngeorgenstadt1 specimen
About Uranopilite
Notable specimens of Uranopilite have been reported from German localities, where its occurrence is linked to uraniferous deposits and secondary alteration zones. Collectors value the mineral for its striking color, rarity, and the complexity of its crystal forms, which can present as delicate, tabular crystals that intergrow into pleasing aggregates. Its association with other uranyl minerals and sulfate phases adds interpretive interest for field studies and cabinet displays alike.