Difference between revisions of "Kaolinite"

Latest revision as of 11:38, 15 September 2022

Kaolinite

Description

A hydrated aluminum silicate mineral which is the principal constituent of Kaolin clay. Kaolinite crystals have a lamellar or plate-like structure that gives the clay its slippery feel. It is a natural alteration product of aluminum silicate rocks, such as feldspar. Pure kaolinite is a primary clay. Most secondary clays contain only a small percentage of kaolinite (Fournier 1996). One exception is ball clay found in Wareham, England.

Synonyms and Related Terms

china clay, kaolin; gaoling (Chin.); Kaolinit (Deut.); caolinita (Esp.); kaolinite (Fr.); kaolien (Ned.); kaoliniet (Ned.); caulinite (Port.);

FTIR (MFA)

Risks

Noncombustible.
ThermoFisher: SDS

Physical and Chemical Properties

Insoluble in water, cold acids and alkalis.
Monoclinic system with with hexagonal, plate-like crystals 0.1-1.0 micrometers.
Perfect cleavage in one direction.
Plastic when wet. Brittle when dry.
Fracture = earthy (friable).
Luster =dull to pearly.
Streak = white.

Composition	Al2Si2O5(OH4)
Mohs Hardness	2.0 - 2.5
Density	2.6-2.63 g/ml
Refractive Index	1.558; 1.565; 1.564

Resources and Citations

* WebMinerals: Kaolinite

R. Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Co., Radnor, PA, 1996.

Mineralogy Database: Kaolinite

Encyclopedia Britannica, http://www.britannica.com Comment: "kaolinite" [Accessed December 4, 2001].

Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000

C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979

Wikipedia: http://en.wikipedia.org/wiki/Kaolinite (Accessed Sept. 7, 2005)

R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966

@@ Line 2: / Line 2: @@
 == Description ==
-A hydrated aluminum silicate mineral which is the principal constituent of [http://cameo.mfa.org/materials/fullrecord.asp?name=kaolin kaolin] clay. Kaolinite crystals have a lamellar or plate-like structure that gives the clay its slippery feel. It is a natural alteration product of aluminum silicate rocks, such as feldspar. Pure kaolinite is a primary clay. Most secondary clays contain only a small percentage of kaolinite (Fournier 1996). One exception is ball clay found in Wareham, England.
+A hydrated aluminum silicate mineral which is the principal constituent of [[kaolin]] clay. Kaolinite crystals have a lamellar or plate-like structure that gives the clay its slippery feel. It is a natural alteration product of aluminum silicate rocks, such as feldspar. Pure kaolinite is a primary clay. Most secondary clays contain only a small percentage of kaolinite (Fournier 1996). One exception is ball clay found in Wareham, England.
 == Synonyms and Related Terms ==
@@ Line 8: / Line 8: @@
 china clay, kaolin; gaoling (Chin.); Kaolinit (Deut.); caolinita (Esp.); kaolinite (Fr.); kaolien (Ned.); kaoliniet (Ned.); caulinite (Port.);
-== Other Properties ==
+[[[SliderGallery rightalign|Kaolinite PMA.TIF~FTIR (MFA)]]]
+== Risks ==
-Insoluble in water, cold acids and alkalis.
+* Noncombustible.
+* ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC211740010&productDescription=KAOLIN+1KG&vendorId=VN00032119&countryCode=US&language=en SDS]
+== Physical and Chemical Properties ==
-Monoclinic system with with hexagonal, plate-like crystals 0.1-1.0 micrometers.
+* Insoluble in water, cold acids and alkalis.
+* Monoclinic system with with hexagonal, plate-like crystals 0.1-1.0 micrometers.
-Perfect cleavage in one direction.   Plastic when wet.  Brittle when dry.
+* Perfect cleavage in one direction.
+* Plastic when wet.  Brittle when dry.
-Fracture = earthy (friable).  Luster =dull to pearly.  Streak = white.
+* Fracture = earthy (friable).
+* Luster =dull to pearly.
+* Streak = white.
 {| class="wikitable"
@@ Line 27: / Line 32: @@
 |-
 ! scope="row"| Density
-| 2.6-2.63
+| 2.6-2.63 g/ml
 |-
 ! scope="row"| Refractive Index
@@ Line 33: / Line 38: @@
 |}
-== Hazards and Safety ==
+== Resources and Citations ==
+* * WebMinerals: [http://www.webmineral.com/data/Kaolinite.shtml Kaolinite]
-Noncombustible.
-Mallinckrodt Baker: [http://www.jtbaker.com/msds/englishhtml/k0870.htm MSDS]
-== Additional Information ==
-R. Fournier, ''Illustrated Dictionary of Practical Pottery'', Chilton Book Co., Radnor, PA, 1996.  Mineralogy Database: [http://www.webmineral.com/data/Kaolinite.shtml Kaolinite]
+* R. Fournier, ''Illustrated Dictionary of Practical Pottery'', Chilton Book Co., Radnor, PA, 1996.
-== Authority ==
+* Mineralogy Database: [http://www.webmineral.com/data/Kaolinite.shtml Kaolinite]
 * ''Encyclopedia Britannica'', http://www.britannica.com  Comment: "kaolinite"   [Accessed December 4, 2001].
@@ Line 49: / Line 49: @@
 * Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
-* C.W.Chesterman, K.E.Lowe, C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979
+* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979
-* Wikipedia, the free encyclopedia, at http://www.wikipedia.com  Comment: http://en.wikipedia.org/wiki/Kaolinite (Accessed Sept. 7, 2005)
+* Wikipedia: http://en.wikipedia.org/wiki/Kaolinite (Accessed Sept. 7, 2005)
-* R. J. Gettens, G.L. Stout, R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
+* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966
 [[Category:Materials database]]