Znucalite
A variety of Minerals
What is Znucalite?
Znucalite or CaZn11(UO2)(CO3)3(OH)20·4(H2O) is a rare, radioactive, white to pale cream colored uranium-containing carbonate mineral, hydrated calcium zinc uranyl carbonate hydroxide. Znucalite crystallizes in the orthorhombic system, often forming aggregates or crusts, and is found as a rare secondary species in carbonate-hosted (meaning it is mined from carbonate containing formations such as limestone) polymetallic veins, and nearby oxidizing uranium veins; on dump material and coating mine walls, apparently of post-mine origin. It fluoresces yellow-green under UV light. It was first described in 1989, after being discovered in Lill Mine, Černojamské deposit (Black pits deposit) in the Czech Republic. It was named in 1990 by Petr Ondruš, František Veselovský, and R. Rybka for its constituent elements.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Znucalite 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.
Znucalite Localities Map
See where Znucalite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- White to light yellow
Chemical Properties
- Chemical Formula
- Zn12Ca(UO2)(CO3)3(OH)22 · 4H2O
- Elements
- C, Ca, H, O, U, Zn
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Znucalite FAQs
How do I identify Znucalite?
Znucalite can be identified by its White to light yellow color. Look for these key characteristics when examining specimens.
What color is Znucalite?
Znucalite typically appears in White to light yellow. Color can vary depending on impurities and formation conditions.
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