orthoclase definition

  • noun:
    • a number of feldspar, essentially potassium aluminum silicate, KAlSi3O8, characterized by a monoclinic crystalline construction and discovered in igneous or granitic stone. Also referred to as potash feldspar.
    • Potassium aluminum silicate, KAlSi3O8, a typical feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase could be the primary feldspar of pegmatite occurrences, in which its most often flesh-colored. Orthoclase is used in porcelain and cup industries and also as a decorative gravel.
    • typical or potash feldspar crystallizing when you look at the monoclinic system and having two cleavages at right angles to each other. See feldspar.
    • Common or potash feldspar, a silicate of aluminum and potassium, happening in monoclinic crystals and huge.
    • a white or colored monoclinic feldspar

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