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jarosite

noun
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ja·​ro·​site | \ jəˈrōˌsīt, ˈjȧrəˌs- \
plural -s

Definition of jarosite

: an ocher-yellow or brown mineral KFe3(SO4)2(OH)6 consisting of basic sulfate of potassium and iron and occurring in minute rhombohedral crystals or in masses — compare ammoniojarosite, argentojarosite, natrojarosite, plumbojarosite

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History and Etymology for jarosite

German jarosit, from Barranco Jaroso, Almería, Spain + German -it -ite

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“Jarosite.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/jarosite. Accessed 9 December 2019.

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