SINCE 1828
jarosite
noun
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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