biotite

Noun

Meaning

Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.

Synonyms

Hypernyms

Hyponyms

Phrases with the word

Examples

A considerable amount of mica (both muscovite and biotite) is often simultaneously formed, and the resulting product has a close resemblance to many kinds of schist. Source: Internet

A granite containing both muscovite and biotite micas is called a binary or two-mica granite. Source: Internet

Biotite is also useful in assessing temperature histories of metamorphic rocks, because the partitioning of iron and magnesium between biotite and garnet is sensitive to temperature. Source: Internet

Because argon escapes readily from the biotite crystal structure at high temperatures, these methods may provide only minimum ages for many rocks. Source: Internet

Cleavage, parting, fracture, and tenacity main Perfect basal cleavage as seen in biotite (black), and good cleavage seen in the matrix (pink orthoclase ). Source: Internet

In rhyolites and trachytes, early crystals of hornblende and biotite may be found in great numbers partially converted into augite and magnetite. Source: Internet

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