copper pyrites

American  

noun

Mineralogy.

1. chalcopyrite.

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copper pyrites British  

/ ˈpaɪraɪts /

noun

1. (functioning as singular) another name for chalcopyrite

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Etymology

Origin of copper pyrites

First recorded in 1770–80

Example Sentences

The copper pyrites are roasted, dissolved in dilute sulphuric acid, and the liquid thus obtained is submitted to electrolysis.

From Scientific American Supplement, No. 433, April 19, 1884 by Various

But since about 1860 sulphuric acid has been more largely made from iron or copper pyrites.

From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg

One gram of copper pyrites, blende, fahlerz, or mispickel, yields 7 or 8 grams of lead, whilst 1 gram of antimonite will give 6, and 1 gram of galena only a little over 3 grams.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

Chili, copper pyrites with gold in. —, walls cracked by earthquake in.

From The Student's Elements of Geology by Lyell, Charles, Sir

Example.—Twenty grams of copper pyrites, known to contain 27.6 per cent. of copper, gave by the method first described 5.22 grams of copper, equalling 26-1/8 per cent.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius