sulphide: see sulfide.
or sulphide mineral

Pyrite from Butte, Mont.

Any member of a group of compounds of sulfur with one or more metals. The metals that occur most commonly are iron, copper, nickel, lead, cobalt, silver, and zinc. They are the ore minerals of most metals used by industry (e.g., antimony, bismuth, copper, lead, nickel, and zinc). Other industrially important metals such as cadmium and selenium occur in trace amounts in numerous common sulfides and are recovered in refining processes.

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Any of three classes of chemical compounds containing the element sulfur. The three classes of sulfides include inorganic sulfides, organic sulfides (thioethers), and phosphine sulfides. Sulfides of many metals are naturally occurring minerals; for example, pyrite (fool's gold) is a sulfide of iron, FeS2. Sulfides are important components of lithium and sodium sulfide batteries, and phosphorous sulfides are used in the tips of strike-anywhere matches and in the preparation of industrial lubricant additives.

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See Sulfide
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