Schrockingerite
Schrockingerite is a uranium-bearing carbonate-sulfate mineral that forms in oxidizing environments associated with carbonate rocks. It typically exhibits a pale to deep orange to red color and occurs as tabular to prismatic crystals or lamellar aggregates, often with a vitreous to resinous luster that can give a distinctive brightness in specimens. The mineral’s composition includes uranyl groups and sulfate, carbonate, and fluoride components, and its appearance can be influenced by hydration levels and substitution within its crystal structure. High-quality crystals and well-preserved aggregates are prized for their contrast against dark gangue and for the dramatic coloration that can occur in particular drying conditions.
- Formula
- NaCa3(UO2)(CO3)3(SO4)F · 10H2O
- Rarity
- Rare
- Stability
- Moderately Stable
- Collector interest
- Very High Interest
- Classification notes
- Uranyl carbonate-sulfate fluoride mineral; secondary uranyl mineral
About Schrockingerite
Notable specimens have been reported from Argentina, among other locales, where secondary uranium-oxide-rich zones in calcareous rocks provide the geochemical setting for Schrockingerite formation. Collectors value specimens for their unusual chemistry and the rarity of uranium-bearing minerals in well-crystallized form. The combination of bright coloration, complex intergrowths with associated minerals, and the mineral’s interpretive value in uranium-bearing parageneses makes Schrockingerite a sought-after piece for those focusing on uranyl-rich carbonate-sulfate assemblages.