sillimanite [sil-uh-muh-nahyt] ExamplesWord Origin noun

  1. a mineral, aluminum silicate, Al2SiO5, occurring in the form of long, slender, and often fibrous crystals.

Origin of sillimanite 1825–30; named after B. Silliman; see -ite1 Also called fibrolite. Examples from the Web for sillimanite Historical Examples of sillimanite

  • Sillimanite usually forms exceedingly minute needles embedded in quartz.

    Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6


  • British Dictionary definitions for sillimanite sillimanite noun

    1. a white, brown, or green fibrous mineral that consists of aluminium silicate in orthorhombic crystalline form and occurs in metamorphic rocks. Formula: Al 2 SiO 5

    Word Origin for sillimanite C19: named after Benjamin Silliman (1779–1864), US chemist sillimanite in Science sillimanite [sĭl′ə-mə-nīt′]

    1. A usually white, pale-green or brown orthorhombic mineral occurring as long, slender, fibrous crystals in metamorphic rocks. It is a polymorph of andalusite and kyanite, but can form at higher temperatures than either of these. Chemical formula: Al2SiO5.
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