jəˈrōˌsīt, ˈjȧrəˌs- noun
( -s )
Etymology: German jarosit, from Barranco Jaroso, Almería, Spain + German -it -ite
: an ocher-yellow or brown mineral KFe 3 (SO 4 ) 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