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单词 uraninite
释义

Definition of uraninite in English:

uraninite

noun jʊˈranɪnʌɪtyo͝oˈrānəˌnīt
mass noun
  • A black, grey, or brown mineral which consists mainly of uranium dioxide and is the chief ore of uranium.

    Example sentencesExamples
    • Using this as a standard he acquired a sample of Norwegian uraninite, had this converted to lead tetramethyl, and then measured the abundance of radiogenic lead.
    • A comprehensive discussion of the mineralogy and occurrence of uraninite has been given by Frondel, to which the reader is strongly referred.
    • The mountain is one of the most important deposits of barite, a barium bearing mineral that exhibits more gravity than any other mineral with no metallic constituent elements with the exception of uraninite.
    • Other accessory minerals are apatite, zircon, monazite, huttonite and rare xenotime, uraninite and betafite.
    • Early investigators recognized bitumen (referred to then as carbon) as having a strong spatial relationship with gold, uraninite and pyrite.
    • For example, the presence of pyrite and uraninite can be explained if the atmosphere and surface waters 2.7 billion years ago contained little or no oxygen, a possibility that is supported by several lines of evidence.
    • At Azegour, Morocco, uraninite occurs in tactite with molybdenite, chalcopyrite, barite, pyrite, hematite, and garnet.
    • Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations.
    • Unusual specimens consisting of massive silver associated with uraninite and a variety of cobalt and nickel arsenides were available at one time from mines in the Great Bear Lake region, Northwest Territories.
    • It converts uranium dissolved in water to uraninite, which is much less soluble; this ‘reduction’ process creates small charges of electricity.

Origin

Late 19th century: from urano-2 + -ite1.

 
 

Definition of uraninite in US English:

uraninite

nounyo͝oˈrānəˌnīt
  • A black, gray, or brown mineral which consists mainly of uranium dioxide and is the chief ore of uranium.

    pitchblende is a variety of uraninite
    Example sentencesExamples
    • Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations.
    • It converts uranium dissolved in water to uraninite, which is much less soluble; this ‘reduction’ process creates small charges of electricity.
    • Early investigators recognized bitumen (referred to then as carbon) as having a strong spatial relationship with gold, uraninite and pyrite.
    • At Azegour, Morocco, uraninite occurs in tactite with molybdenite, chalcopyrite, barite, pyrite, hematite, and garnet.
    • For example, the presence of pyrite and uraninite can be explained if the atmosphere and surface waters 2.7 billion years ago contained little or no oxygen, a possibility that is supported by several lines of evidence.
    • Unusual specimens consisting of massive silver associated with uraninite and a variety of cobalt and nickel arsenides were available at one time from mines in the Great Bear Lake region, Northwest Territories.
    • A comprehensive discussion of the mineralogy and occurrence of uraninite has been given by Frondel, to which the reader is strongly referred.
    • Other accessory minerals are apatite, zircon, monazite, huttonite and rare xenotime, uraninite and betafite.
    • Using this as a standard he acquired a sample of Norwegian uraninite, had this converted to lead tetramethyl, and then measured the abundance of radiogenic lead.
    • The mountain is one of the most important deposits of barite, a barium bearing mineral that exhibits more gravity than any other mineral with no metallic constituent elements with the exception of uraninite.

Origin

Late 19th century: from urano- + -ite.

 
 
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更新时间:2024/11/10 21:38:01