Iron(II) sulfide

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

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Notion

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Science and technology

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What Wikipedia says

Iron(II) sulfide or ferrous sulfide (Br.E. sulphide) is one of a family of chemical compounds and minerals with the approximate formula FeS. Iron sulfides are often iron-deficient non-stoichiometric. All are black, water-insoluble solids.

Excerpt from the Wikipedia article “Iron(II) sulfide”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Benjah-bmm27, Public domain, via Wikimedia Commons.