Difference between revisions of "Montmorillonite"

Latest revision as of 08:19, 19 October 2022

Montmorillonite

Description

A group of Clay minerals that have the ability to absorb large quantities of water. Montmorillonite is a fine-grain, aluminum silicate compound with flat hexagonal crystals. They are formed by the decomposition of basic rocks such as Basalt. Most secondary clays contain some montmorillonite. Some clays high in montmorillonite, such as Bentonite, are highly plastic with high shrinkage rates. Other montmorillonite clays, such as Fuller's earth, are aplastic.

Synonyms and Related Terms

smectite; beidellite; bentonite; fuller's earth; montmorillonita (Esp.); montmorillonite (Fr;); montmorilonite (Port.); Montmorillonit (Deut.); montmorilloniet (Ned.)

FTIR (MFA)

Risks

Inhalation can cause lung irritation.

Physical and Chemical Properties

Broad sheets break into irregular fluffy masses.
Streak = white

Composition	Al2O3-4SiO2-H2O
Mohs Hardness	1.5-2.0
Density	2.2-2.7 g/ml
Refractive Index	1.480 - 1.630

Resources and Citations

Mineralogy Database: Montmorillonite

G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 175

The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 6341

Encyclopedia Britannica, http://www.britannica.com Comment: "Montmorillonite." Accessed: 15 June 2004..

Wikipedia: http://en.wikipedia.org/wiki/Montmorillonite (Accessed Sept. 10, 2005)

Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993

Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997

@@ Line 7: / Line 7: @@
 smectite; beidellite; bentonite; fuller's earth; montmorillonita (Esp.); montmorillonite (Fr;); montmorilonite (Port.); Montmorillonit (Deut.); montmorilloniet (Ned.)
+[[[SliderGallery rightalign|Montmorillonite mica (very thin).TIF~FTIR (MFA)]]]
+== Risks ==
-== Other Properties ==
+* Inhalation can cause lung irritation.
-Broad sheets break into irregular fluffy masses.
+== Physical and Chemical Properties ==
-Streak = white
+* Broad sheets break into irregular fluffy masses.
+* Streak = white
 {| class="wikitable"
@@ Line 23: / Line 26: @@
 |-
 ! scope="row"| Density
-| 2.2-2.7
+| 2.2-2.7 g/ml
 |-
 ! scope="row"| Refractive Index
@@ Line 29: / Line 32: @@
 |}
-== Hazards and Safety ==
+== Resources and Citations ==
-Inhalation can cause lung irritation.
+* Mineralogy Database: [http://www.webmineral.com/data/Montmorillonite.shtml Montmorillonite]
-== Additional Information ==
-Mineralogy Database: [http://www.webmineral.com/data/Montmorillonite.shtml Montmorillonite]
-== Sources Checked for Data in Record ==
 * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p. 175
@@ Line 43: / Line 40: @@
 * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983  Comment: entry 6341
-* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "Montmorillonite." Encyclopædia Britannica. 2004.  Encyclopædia Britannica Premium Service.  15 Apr. 2004  .
+* ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "Montmorillonite." Accessed: 15 June 2004..
-* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Montmorillonite (Accessed Sept. 10, 2005)
+* Wikipedia: http://en.wikipedia.org/wiki/Montmorillonite (Accessed Sept. 10, 2005)
 * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993