: any of several sulfides of iron
Recent Examples on the Web For example, the iron sulfides that are the predominant mineral in nickel sulfide deposits produce distinct reddish rust when exposed to air and rainwater. —Josh Goldman, IEEE Spectrum, 29 Apr. 2023 Both Jowitt and Anthony Love, a geologist at Appalachian State University, said the rocks shown in the post appear to be some type of iron sulfide and could be pyrite, also known as fool’s gold. —Isabella Fertel, USA TODAY, 1 Feb. 2023 Most copper comes from chalcopyrite, a copper-iron sulfide mineral. —David Bressan, Forbes, 31 Dec. 2022 To boot, there appears to be an extremely dense layer more than a hundred miles thick encasing the core, perhaps a shell of iron sulfide. —Veronique Greenwood, Discover Magazine, 24 Mar. 2012 In the case of Lila Canyon, the coal deposits contain pyrite, or iron sulfide, according to Charles Kocsis, a University of Utah professor of mining engineering. —Brian Maffly, The Salt Lake Tribune, 13 Dec. 2022 There was also a large amount of an iron sulfide called pyrrhotite, which was not found in the meteorite samples used for comparison. —Jennifer Ouellette, Ars Technica, 26 Sep. 2022 Red areas are due to rust mixtures, yellows are due to iron sulfide, purples are from goethite or oxidized limonite, and the greens come from chlorite. —Stacey Leasca, Travel + Leisure, 12 May 2022 The small black patches of iron sulfide are also found as inclusions in octahedrites. —Jennifer Ouellette, Ars Technica, 23 Feb. 2022 See More
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