| 释义 |
Definition of uraninite in English: uraninitenoun jʊˈranɪnʌɪtyo͝oˈrānəˌnīt mass nounA black, grey, or brown mineral which consists mainly of uranium dioxide and is the chief ore of uranium. 沥青铀矿 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.
OriginLate 19th century: from urano-2 + -ite1. Definition of uraninite in US English: uraninitenounyo͝oˈrānəˌnīt A black, gray, or brown mineral which consists mainly of uranium dioxide and is the chief ore of uranium. 沥青铀矿 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.
OriginLate 19th century: from urano- + -ite. |