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brookite
[ brook-ahyt ]
noun
Mineralogy.
- a brown, red, or black mineral, titanium dioxide, TiO 2 , trimorphous with rutile and anatase.
brookite
/ ˈ²ú°ùÊŠ°ì²¹Éª³Ù /
noun
- a reddish-brown to black mineral consisting of titanium oxide in orthorhombic crystalline form: occurs in silica veins. Formula: TiO 2
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˜yÐÄvlog History and Origins
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˜yÐÄvlog History and Origins
Origin of brookite1
C19: named after Henry J. Brooke (died 1857), English mineralogist
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Example Sentences
Examples have not been reviewed.
In some crystals, e.g. brookite, the optic axes for red light and for blue light may be, at certain temperatures, in planes at right angles.
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The two latter are tetragonal in crystallization, whilst brookite is orthorhombic.
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Two types of brookite crystals may be distinguished.
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The lustre of brookite is metallic-adamantine.
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Brookite occurs only as crystals, never in compact masses, and is usually associated with either anatase or rutile.
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