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单词 sanidine
释义

Definition of sanidine in English:

sanidine

noun ˈsanɪdiːnˈsanəˌdēn
mass noun
  • A glassy mineral of the alkali feldspar group, typically occurring as tabular crystals.

    透长石

    Example sentencesExamples
    • Feldspar (including sanidine and plagioclase) separates were handpicked from a 62-125 mm sieve fraction crushed from megacrysts.
    • At temperatures above about 660°C complete solid solution occurs between the two alkali feldspar end-members sanidine and high albite, but below this there is a break and two feldspars of different composition occur together.
    • The dominant non-clay mineral composition of the coarse fraction consists of biotite, quartz, and sanidine with lesser amounts of apatite and zircon.
    • The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
    • Closer to the contact microcline is replaced by sanidine, and perthitic exsolution in detrital alkali feldspar begins to disappear.

Origin

Early 19th century: from Greek sanis, sanid- 'board' + -ine4.

Definition of sanidine in US English:

sanidine

nounˈsanəˌdēn
  • A glassy mineral of the alkali feldspar group, typically occurring as tabular crystals.

    透长石

    Example sentencesExamples
    • The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
    • Feldspar (including sanidine and plagioclase) separates were handpicked from a 62-125 mm sieve fraction crushed from megacrysts.
    • At temperatures above about 660°C complete solid solution occurs between the two alkali feldspar end-members sanidine and high albite, but below this there is a break and two feldspars of different composition occur together.
    • Closer to the contact microcline is replaced by sanidine, and perthitic exsolution in detrital alkali feldspar begins to disappear.
    • The dominant non-clay mineral composition of the coarse fraction consists of biotite, quartz, and sanidine with lesser amounts of apatite and zircon.

Origin

Early 19th century: from Greek sanis, sanid- ‘board’ + -ine.

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更新时间:2024/9/21 17:57:31