/brook"uyt/, n. Mineral.
a brown, red, or black mineral, titanium dioxide, TiO2, trimorphous with rutile and anatase.
[1875-80; named after H. J. Brooke (1771-1857), English mineralogist; see -ITE1]

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      one of three minerals composed of titanium dioxide (TiO2) (see also rutile; anatase). It typically occurs as brown, metallic crystals in veins in gneiss and schist; it is also found in placer deposits and, less commonly, in zones of contact metamorphism. It is widespread in veins in the Alps; in Fronolen, north Wales, it forms crystals on crevice walls in diabase. Brookite forms crystals that belong to the orthorhombic system. For detailed physical properties, see oxide mineral (table).

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Universalium. 2010.

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  • brookite — noun Etymology: Henry J. Brooke died 1857 English mineralogist Date: 1825 titanium dioxide TiO2 occurring as a mineral in orthorhombic crystals commonly translucent brown or opaque brown to black …   New Collegiate Dictionary

  • brookite — noun A dark brown mineral form of titanium dioxide, with the chemical formula TiO …   Wiktionary

  • brookite — brook·ite …   English syllables

  • brookite — ˈbru̇ˌkīt noun ( s) Etymology: Henry J. Brooke died 1857 English mineralogist + English ite : a mineral consisting of titanium dioxide TiO2 and identical in composition with rutile and octahedrite but occurring in orthorhombic crystals commmonly… …   Useful english dictionary

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