rutile

[ roo-teel, -tahyl ]

Phonetic (Standard)IPA

noun

a common mineral, titanium dioxide, TiO 2 , usually reddish-brown in color with a brilliant metallic or adamantine luster, occurring in crystals: used to coat welding rods.

rutile

/ ˈruːtaɪl /

a black, yellowish, or reddish-brown mineral, found in igneous rocks, metamorphosed limestones, and quartz veins. It is a source of titanium. Composition: titanium dioxide. Formula: TiO 2 . Crystal structure: tetragonal

rutile

/ ro̅o̅′tēl′,-tīl′ /

A lustrous red, reddish-brown, or black tetragonal mineral that is an ore of titanium. Rutile usually occurs as prismatic crystals in other minerals, especially as dark needlelike crystals in quartz. Chemical formula: TiO 2 .

Origin of rutile¹

1795–1805; < French < German Rutil < Latin rutilus red ¹

Origin of rutile¹

C19: via French from German Rutil , from Latin rutilus red, glowing

Biotite, if present, is brown; epidote is yellow or colourless; rutile, apatite and quartz all occur with some frequency.

Its most common ore is rutile (TiO2), which resembles silica in many respects.

Rutile is much lighter, 4·2, and the streak light-brown; tourmaline is only 3·2.

There is no distinct cleavage (rutile and anatase have cleavages); hardness 5-6; sp.

Minute crystals of brookite have been detected with anatase and rutile in the iron-ore of Cleveland in Yorkshire.

April 25, 2024firkin

[fur-kin ]

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