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sillimanite

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.04 sec.
sil·li·ma·nite  (sl-m-nt)
n.
A usually white, hard mineral, Al2SiO5, occurring in highly metamorphosed rock as long, slender, fibrous crystals. Also called fibrolite.
[After Benjamin Silliman.]
sillimanite [ˈsɪlɪməˌnaɪt]
n
(Earth Sciences / Minerals) a white, brown, or green fibrous mineral that consists of aluminium silicate in orthorhombic crystalline form and occurs in metamorphic rocks. Formula: Al2SiO5
[named after Benjamin Silliman (1779-1864), US chemist]
sillimanite  (sl-m-nt)
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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