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Bentonite
A rock subtype
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About Bentonite
An impure clay, primarily montmorillonite, commonly mined for various industrial uses.
Commonly formed by the weathering and alteration of acidic tuffs and related rocks.
Originally described from Fort Benton shales, Wyoming, USA.
Commonly formed by the weathering and alteration of acidic tuffs and related rocks.
Originally described from Fort Benton shales, Wyoming, USA.
Unique Identifiers
Mindat ID:
9141
Long-form identifier:
mindat:1:1:9141:7
Similar Names
| Benstonite | A valid IMA mineral species | Ba6Ca6Mg(CO3)13 |
| Bentorite | A valid IMA mineral species | Ca6Cr2(SO4)3(OH)12 · 26H2O |
| K-bentonite | A synonym of 'Potassium bentonite' |
Classification of Bentonite
Sub-divisions of Bentonite
Synonyms of Bentonite
Other Language Names for Bentonite
Varieties of Bentonite
| Cimolite | A clay first described from Cimolo, Greece, mentioned by Theophrastos and Pliny. Present locality name is Kimolos Island (Argentiera), Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon), Kykládes Prefecture, Aegean Islands (Aiyaíon) Department, Gree... |
Common Associates
Associations Based on Photo Data:
Internet Links for Bentonite
mindat.org URL:
https://www.mindat.org/min-9141.html
Please feel free to link to this page.
Please feel free to link to this page.
References for Bentonite
Reference List:
Christidis, George E. (1995) Origin of the Bentonite Deposits of Eastern Milos, Aegean, Greece: Geological, Mineralogical and Geochemical Evidence. Clays and Clay Minerals, 43 (1) 63-77 doi:10.1346/ccmn.1995.0430108
Christidis, George E. (1998) Comparative Study of the Mobility of Major and Trace Elements During Alteration of an Andesite and a Rhyolite to Bentonite, in the Islands of Milos and Kimolos, Aegean, Greece. Clays and Clay Minerals, 46 (4) 379-399 doi:10.1346/ccmn.1998.0460403
Christidis, George E. (2001) Formation and Growth of Smectites in Bentonites: A Case Study from Kimolos Island, Aegean, Greece. Clays and Clay Minerals, 49 (3) 204-215 doi:10.1346/ccmn.2001.0490303
García-Romero, Emilia, María Manchado, Eva, Suárez, Mercedes, García-Rivas, Javier (2019) Spanish Bentonites: A Review and New Data on Their Geology, Mineralogy, and Crystal Chemistry. Minerals, 9 (11) 696 doi:10.3390/min9110696
Kimolos Island, Kimolos, Milos, South Aegean, Greece