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rickardite

copper telluride mineral with the formula Cu7Te5, the purple-red masses of which resemble tarnished bornite. It was discovered at Vulcan, Colo., where it is accompanied by weissite, another copper telluride (Cu2XTe). For chemical formulas and detailed physical properties, see sulfide mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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