Calciouranoite
Calciouranoite is a rare hydrated uranium oxide mineral with the chemical formula (Ca,Ba,Pb,K,Na)U2O7·5H2O. It belongs to the triclinic crystal system and is classified under the Strunz system as 4.GB.20. This mineral is characterized by its dull to earthy luster and typically exhibits a yellow to brown coloration. It has a relatively low hardness on the Mohs scale and a moderate density. Calciouranoite is part of the uranoite group, which consists of uranium-bearing minerals with complex compositions.
Composition
- UUranium66.3%
- OOxygen26.7%
- CaCalcium5.6%
- HHydrogen1.4%
Overview
Calciouranoite is a rare hydrated uranium oxide mineral with the chemical formula (Ca,Ba,Pb,K,Na)U2O7·5H2O. It belongs to the triclinic crystal system and is classified under the Strunz system as 4.GB.20. This mineral is characterized by its dull to earthy luster and typically exhibits a yellow to brown coloration. It has a relatively low hardness on the Mohs scale and a moderate density. Calciouranoite is part of the uranoite group, which consists of uranium-bearing minerals with complex compositions.
Etymology
The name calciouranoite is derived from its chemical composition, particularly the presence of calcium and uranium.
How to recognize it
Calciouranoite can be identified by its earthy luster, yellow to brown color, and low hardness. It does not have a distinct streak and is typically found in uranium-rich environments. Due to its rarity and specific chemical composition, it is often confused with other uranium-bearing minerals, but its unique chemical makeup helps in differentiation.
Trivia
Calciouranoite is notable for its complex chemical formula, which includes multiple cations such as calcium, barium, lead, potassium, and sodium. It is a rare mineral, with few documented occurrences. Its triclinic crystal system adds to its uniqueness among uranium minerals.