chalcocite
Americannoun
noun
Etymology
Origin of chalcocite
1865–70; irregular chalco- + (anthra)cite
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The production of copper from chalcocite is performed by roasting the Cu2S in air to produce the Cu.
From Textbooks • Feb. 14, 2019
Orvana has received approval to mine chalcocite, a mineral that is primarily copper, in a project here that the company says will create $2 billion in economic activity over 20 years.
From New York Times • May 25, 2012
Copper is known to be taken into solution as copper sulphate at the surface, and to be redeposited as chalcocite where these sulphate solutions come in contact with chalcopyrite or pyrite below.
From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)
Not only has the process been duplicated in the laboratory, but the common coating of chalcocite around grains of pyrite and chalcopyrite below the water level indicates that this process has been really effective.
From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)
Owing to the frequent presence of mechanically admixed chalcopyrite and chalcocite, the published analyses of erubescite show wide variations, the copper, for example, varying from 50 to 70%.
From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" by Various
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