a mineral, K2Mg2(SO4)3, that is often found in salt deposits as a natural sulfate of potassium and magnesium, used as a source of potash
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
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Word origin of 'langbeinite'
, after A. Langbein
, 19th-c. Ger chemist who identified it + -it