Home Dictionary Bbiotite

biotite

biotite

Noun

pl: biotites

Biotite is characterized by its distinct sheet-like structure, allowing it to be split into thin, flexible flakes. In a geological context, its presence often serves as a diagnostic marker for identifying specific types of igneous and metamorphic rocks, such as granite or schist.

As a technical mineralogical term, it is used almost exclusively in scientific or academic discourse. It carries a neutral, descriptive connotation and is typically paired with terms relating to composition, crystallization, or mineral assays.

Meanings

Nounbiotite

A common rock-forming mineral consisting of a mica with a dark color, typically brown or black, containing iron and magnesium.

The geologist identified a high concentration of biotite in the granite sample.

Examples

The thin sheets of biotite shimmered under the microscope.

Trivia

Look at these dark flakes of biotite embedded in the quartz.

School Life

Biotite is often used to determine the cooling history of igneous rocks.

School Life

I wonder if this sample contains more biotite than muscovite.

The specimen is characterized by a high percentage of biotite mica.

The dark brown color of the rock comes from the presence of biotite.

Trivia

We need to analyze the biotite crystals to date the formation of the mountain range.

History

The geologist noted that the biotite was weathered into clay minerals.

Is that a grain of biotite or just a piece of organic debris?

School Life

Last Updated: May 2026•Report an Error