potassium bentonite

potassium bentonite

[pə′tas·ē·əm ′bent·ən‚īt]
(geology)
A clay of the illite group that contains potassium and is formed by alteration of volcanic ash. Also known as K bentonite; potash bentonite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.