Share this entry
sillimanite Line breaks: sil¦li|man¦ite
Pronunciation: /ˈsɪlɪmənʌɪt/

Definition of sillimanite in English:


[mass noun]
An aluminosilicate mineral typically occurring as fibrous masses, commonly in schist or gneiss.
Example sentences
  • Muscovite and aluminosilicates are almost entirely absent although, where present, the aluminosilicate is sillimanite.
  • The aluminium silicate minerals andalusite, kyanite, and sillimanite are good examples of this phenomenon of polymorphism.
  • Growth of titanite took place during the metamorphic climax in rocks from the kyanite and sillimanite zones.


Mid 19th century: from the name of Benjamin Silliman (1779–1864), American chemist + -ite1.

Definition of sillimanite in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources