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jarosite

American  
[jar-uh-sahyt, juh-roh-sahyt] / ˈdʒær əˌsaɪt, dʒəˈroʊ saɪt /

noun

  1. a yellowish or brownish mineral, a hydrous sulfate of potassium and iron, KFe 3 (SO4 ) 2 (OH) 6 , occurring in small crystals or large masses.

jarosite British  
/ ˈdʒærəˌsaɪt /

noun

  1. a yellow to brown secondary mineral consisting of basic hydrated sulphate of iron and potassium in masses or hexagonal crystals. Formula: KFe 3 (SO 4 ) 2 (OH) 6

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of jarosite

1850–55; named after Barranco Jaroso (in Almería, Spain); see -ite 1

Example Sentences

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The sulfate deposit, made mainly of jarosite, a hydrous sulfate, was interpreted to have formed when the blanket of volcanic pyroclastic materials came to rest on a glacier and reacted chemically with the ice.

From Science Daily • Mar. 13, 2024

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.