1) Mineral 2) Pitchblende 3) Radioactive mineral 4) Uranium mineral 5) Uranium ore
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https://www.crosswordclues.com/clue/uraninite
1) Pitchblende
Found on
https://www.crosswordclues.com/clue/uraninite
Uraninite is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2, but due to oxidation the mineral typically contains variable U3O8. Additionally due to the decay of the uranium it contains oxides of lead and trace amounts of helium. It may also contain thorium, and rare earth elements. It is most commonly k...
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http://en.wikipedia.org/wiki/Uraninite
• (n.) A mineral consisting chiefly of uranium oxide with some lead, thorium, etc., occurring in black octahedrons, also in masses with a pitchlike luster; pitchblende.
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http://thinkexist.com/dictionary/meaning/uraninite/
a major ore mineral of uranium, uranium dioxide (UO2). Uraninite usually forms black, gray, or brown crystals that are moderately hard and generally ... [5 related articles]
Found on
http://www.britannica.com/eb/a-z/u/16
Type: Term Pronunciation: yū-ran′i-nīt Synonyms: pitchblende
Found on
http://www.medilexicon.com/medicaldictionary.php?t=95818
Uraninite is a radioactive important source of uranium. It consists chiefly of uranium oxide with some lead, thorium, etc. It occurs in pegmatites and veins in granite; also as sedimentary deposits. It is found in black octahedrons and also in masses with a pitch like lustre. It has a relative hardness of 6.
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http://www.probertencyclopaedia.com/browse/HU.HTM
[
n] - a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium
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http://www.webdictionary.co.uk/definition.php?query=uraninite
pitchblende noun a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore
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https://www.encyclo.co.uk/local/20974
Uranium oxide, UO
2, an ore mineral of uranium, also known as pitchblende when occurring in massive form. It is black or brownish-black, very dense, and radioactive. It occurs in veins and as massive crusts, usually associated with granite rocks
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https://www.encyclo.co.uk/local/21221
A uranium mineral with a high uranium oxide content. Frequently found in pegmatite dykes.
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https://www.encyclo.co.uk/local/22733
A uranium mineral with a high uranium oxide content. Frequently found in pegmatite dykes.
Found on
https://www.encyclo.co.uk/local/22734
a mineral, probably originally uranium dioxide, UO, but altered by radioactive decay, and usually containing uranium trioxide, lead, radium, and helium, occurring in several varieties, including pitchblende: the most important ore of uranium.
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https://www.infoplease.com/dictionary/uraninite
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