Wiktionary
n. (context mineral chemistry English) A family of chemical compounds and minerals with the chemical formula CuxSu.
Wikipedia
'''Copper sulfides '''(British English spelling: copper sulphide) describe a family of chemical compounds and minerals with the formula CuS. Both minerals and synthetic materials comprise these compounds. Some copper sulfides are economically important ores.
Prominent copper sulfide minerals include CuS ( chalcocite) and CuS ( covellite). In the mining industry, the minerals bornite or chalcopyrite, which consist of mixed copper-iron sulfides, are often referred to as "copper sulfides". In chemistry, a "binary copper sulfide" is any binary chemical compound of the elements copper and sulfur. Whatever their source, copper sulfides vary widely in composition with 0.5 ≤ Cu/S ≤ 2, including numerous non-stoichiometric compounds.
Copper(I) sulfide is a copper sulfide, a chemical compound of copper and sulfur. It has the chemical compound CuS. It is found in nature as the mineral chalcocite. It has a narrow range of stoichiometry ranging from CuS to CuS.
Usage examples of "copper sulfide".
We checked into this, and, indeed, in all the hexes surrounding Yugash we found enormous quantities of copper, copper oxide, or copper sulfide, either in the physical composition of the creatures or in the atmosphere itself.