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sillimanite
[ sil-uh-muh-nahyt ]
noun
- a mineral, aluminum silicate, Al 2 SiO 5 , occurring in the form of long, slender, and often fibrous crystals.
sillimanite
/ ˈsɪlɪməˌnaɪt /
noun
- 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
sillimanite
/ sĭl′ə-mə-nīt′ /
- 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: Al 2 SiO 5 .
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Word History and Origins
Origin of sillimanite1
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Word History and Origins
Origin of sillimanite1
C19: named after Benjamin Silliman (1779–1864), US chemist
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Example Sentences
In mica-gneisses sillimanite, kyanite, andalusite and garnet may occur.
From Project Gutenberg
Sillimanite usually forms exceedingly minute needles embedded in quartz.
From Project Gutenberg
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