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sillimanite in British English
(ˈsɪlɪməˌnaɪt)
noun
a white, brown, or green fibrous mineral that consists of aluminium silicate in orthorhombic crystalline form and occurs in metamorphic rocks. Formula: Al2SiO5
Word origin
C19: named after Benjamin Silliman (1779–1864), US chemistsillimanite in American English
(ˈsɪləməˌnaɪt)
US
noun
a very hard, mineral, aluminum silicate, Al2SiO5, usually found in metamorphic rock as long, slender crystals of various colors
Word origin
after B. Silliman (1779-1864), U.S. chemist and geologist + -ite1Image ofsillimanite
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