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Answer for the clue "An ore of uranium and radium and vanadium ", 9 letters:
carnotite

Alternative clues for the word carnotite

Word definitions for carnotite in dictionaries

Wiktionary Word definitions in Wiktionary
n. (context mineral English) A yellow mineral that is a potassium uranyl vanadate that is a major ore or uranium, with the chemical formula potassium 2 (uraniumoxygen 2 ) 2 (vanadiumO 4 ) 2 '''·'''3water.

WordNet Word definitions in WordNet
n. a yellow radioactive mineral; an ore of uranium and radium and vanadium

Wikipedia Word definitions in Wikipedia
Carnotite is a potassium uranium vanadate radioactive mineral with chemical formula : K ( U O )( VO ) · 3 HO . The water content can vary and small amounts of calcium , barium , magnesium , iron , and sodium are often present.

Usage examples of carnotite.

With two assistants and a complete equipment of scientific instruments, I began the exploration of a deserted working in a mountainous district, where several weeks before, a number of mining engineers had reported traces of carnotite and what they believed to be radioactive gases.

Tommy took the fragment of carnotite, which to his uneducated eye appeared to be an ordinary chunk of sandstone such as he'd pick up in a creek bed in Mission Canyon behind Santa Bonita.