The Encyclopedia Americana (1920)/Rutile

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←Ruthven, Raid of The Encyclopedia Americana
Rutile		 Rutland (Massachusetts)→
Edition of 1920. See also Rutile on Wikipedia, and the disclaimer.

RUTILE, titanium oxide TiO2 in tetragonal form, the chief source of titanium; also used as a gem and for coloring matter for porcelain, artificial teeth, etc. Mined in Virginia.

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