Leószilárdite
A variety of Minerals
What is Leószilárdite?
Leószilárdite is a mineral discovered by Travis Olds of the University of Notre Dame and colleagues in the Markey Mine in Utah, USA. They named the mineral in honor of Leó Szilárd, Hungarian-born physicist and inventor. Leószilárdite is the first naturally occurring sodium- and magnesium-containing uranyl carbonate. It is rare and water-soluble, and was discovered on a seam of carbon-rich material deposited by an ancient stream. Groundwater reacted with the uraninite ore to create leószilárdite and other minerals.
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Leószilárdite Localities Map
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Quick Facts
Physical Properties
- Color
- Pale yellow
- Hardness (Mohs)
- 2
- Streak
- White
Chemical Properties
- Chemical Formula
- Na6Mg(UO2)2(CO3)6·6H2O
- Elements
- C, H, Mg, Na, O, U

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