biotite การใช้

• Common examples of micas are muscovite, and the biotite series.
• It also occurs in carbonatites and chlorite, biotite and phlogopite.
• Around Mount Job, rhyodacite contains hornblende, biotite and quartz.
• The biotite forms hexagonal " blocks, " up to across.
• Phenocrysts in the postglacial rocks are biotite, plagioclase and quartz.
• Biotite is annite, with high Fe / Mg ratio.
• Biotite, cancrinite and sodalite are characteristic of this rock.
• It contains also orthoclase, nepheline, biotite, aegirine, acmite.
• The dark matrix consists of biotite, aegirine-augite and melanite.
• Hornblende and biotite occur also, but are less common.
• Biotite is virtually absent, but zircon is very common.
• Biotite lamprophyres ( minettes ) are oriented in the north west direction.
• The biotite has aligned itself parallel to sigmoidal shear bands.
• The rhyodacite is characterized by phenocrysts of plagioclase, quartz and biotite.
• It contains biotite, orthopyroxene, plagioclase and smaller amounts of quartz.
• Microlites in the Lake unit rocks include biotite, plagioclase and spinel.
• Dacites have biotite, hornblende, plagioclase and quartz phenocrysts.
• Rocks are porphyritic and contain hornblende as well as biotite or pyroxene.
• These include the amphibole, biotite, feldspar and zircon.
• Minerals in its rocks include amphibole, biotite, orthopyroxene and plagioclase.