| 释义 |
Definition of biotite in English: biotitenoun ˈbʌɪətʌɪtˈbaɪəˌtaɪt mass nounA black, dark brown, or greenish black micaceous mineral, occurring as a constituent of many igneous and metamorphic rocks. Example sentencesExamples - Although dark minerals such as biotite and hornblende are usually present, giving the rock a speckled appearance, they are never abundant.
- All four samples are medium-grained, and comprise variable proportions of hornblende, feldspar and quartz with accessory biotite and titanite.
- These microfaults are commonly pulled apart with growth of new quartz and biotite between pulled apart feldspar and hornblende.
- Quartz, feldspar, white mica and biotite are all major constituents.
- In most of the intrusion, hornblende and biotite are both present, but occasionally either may constitute the sole mafic phase.
Origin Mid 19th century: named after J.-B. Biot (1774–1862), French mineralogist. Definition of biotite in US English: biotitenounˈbaɪəˌtaɪtˈbīəˌtīt A black, dark brown, or greenish black variety of mica, occurring in many igneous and metamorphic rocks. Example sentencesExamples - In most of the intrusion, hornblende and biotite are both present, but occasionally either may constitute the sole mafic phase.
- These microfaults are commonly pulled apart with growth of new quartz and biotite between pulled apart feldspar and hornblende.
- Quartz, feldspar, white mica and biotite are all major constituents.
- All four samples are medium-grained, and comprise variable proportions of hornblende, feldspar and quartz with accessory biotite and titanite.
- Although dark minerals such as biotite and hornblende are usually present, giving the rock a speckled appearance, they are never abundant.
Origin Mid 19th century: named after J.-B. Biot (1774–1862), French mineralogist. |