brookite

[broo k-ahyt]

noun Mineralogy.

a brown, red, or black mineral, titanium dioxide, TiO2, trimorphous with rutile and anatase.

Origin of brookite

1875–80; named after H. J. Brooke (1771–1857), English mineralogist; see -ite¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for brookite

Historical Examples of brookite

Minute crystals of brookite have been detected with anatase and rutile in the iron-ore of Cleveland in Yorkshire.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3
Various
Brookite occurs only as crystals, never in compact masses, and is usually associated with either anatase or rutile.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3
Various
Titanic acid occurs in nature crystallized in anatase, arkansite, brookite, and rutile.
A System of Instruction in the Practical Use of the Blowpipe
Anonymous

British Dictionary definitions for brookite

brookite

noun

a reddish-brown to black mineral consisting of titanium oxide in orthorhombic crystalline form: occurs in silica veins. Formula: TiO 2

Word Origin for brookite

C19: named after Henry J. Brooke (died 1857), English mineralogist

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012