a mineral, K2
, 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, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'langbeinite'
, after A. Langbein
, 19th-c. Ger chemist who identified it + -it