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    Which of the following is an example of ferromagnesian phyllosilicate mineral?
    Question

    Which of the following is an example of ferromagnesian phyllosilicate mineral?

    A.

    Biotite

    B.

    Feldspars

    C.

    Orthoclase

    D.

    Amphiboles

    E.

    Answer not known

    Correct option is A

    Biotite is a mica group mineral.
    It is rich in iron and magnesium.
    Belongs to phyllosilicate minerals.
    Shows sheet-like structure.
    Commonly found in igneous rocks.
    Plays role in soil potassium supply.
    Hence, Biotite is correct.

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