Uranocircite
A variety of Autunite Group
What is Uranocircite?
Uranocircite or Uranocircite-II is a uranium mineral with the chemical formula: Ba(UO2)2(PO4)2·10H2O. Uranocircite-I was discredited (the IMA-CMNMC published 'The New IMA List of Minerals', September 2012). It is a phosphate mineral which contains barium and is a green to yellow colour. It has a Mohs hardness of about 2. Uranocircite was named after the Greek for "falcon" because it was discovered in Falkenstein, Germany. Uranocircite contains about 45% uranium in it and is mainly mined in Bergen in Saxony, Germany.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Uranocircite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Uranocircite Localities Map
See where Uranocircite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Yellow-green, yellow; pale canary-yellow in transmitted light.
- Hardness (Mohs)
- 2 - 2.5
- Density
- 3.46 g/cm³
Chemical Properties
- Chemical Formula
- Ba(UO2)2(PO4)2 · 10H2O
- Elements
- Ba, H, O, P, U
Also Known As
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Uranocircite FAQs
How do I identify Uranocircite?
Uranocircite can be identified by its hardness of 2 - 2.5 on the Mohs scale, Yellow-green color. Look for these key characteristics when examining specimens.
What color is Uranocircite?
Uranocircite typically appears in Yellow-green, yellow; pale canary-yellow in transmitted light.. Color can vary depending on impurities and formation conditions.
How hard is Uranocircite?
Uranocircite has a hardness of 2 - 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
