Mineralogy Database

Kaolinite Mineral Data

Search Webmineral :
  
Advertisment

General Kaolinite Information

Help on Chemical  Formula: Chemical Formula: Al2Si2O5(OH)4
Help on Composition: Composition: Molecular Weight = 258.16 gm
   Aluminum  20.90 %  Al   39.50 % Al2O3
   Silicon   21.76 %  Si   46.55 % SiO2
   Hydrogen   1.56 %  H    13.96 % H2O
   Oxygen    55.78 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al2Si2O5(OH)4
Help on Environment: Environment: Secondary mineral derived from the wathering of alumino-silicate minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1930
Help on Locality: Locality: Kao-Ling, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Name Pronunciation: Name Pronunciation: Kaolinite + Pronunciation Say KAOLINITE
Help on Synonym: Synonym: Pianlinite - Disordered
 

Kaolinite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Kaolinite

Comments: Authigenic kaolinite plates covering a quartz grain overgrown with authigenic quartz. SEM image of a core sample.
Location: Unknown. Scale: Picture size 50 µ-m.
© OMNI Laboratories, Inc

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Ammonioalunite   Kaolinite

Comments: White chalky ammonioalunite on darker kaolinite.
Location: Schoeller Mine, Kladno, Stredocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Kaolinite   Pianlinite

Comments: Off-white colored minute pianlinite (kaolinite) fragment.
Location: Pianling, China. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kaolinite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5755:1:0.8253
Help on Cell Dimensions: Cell Dimensions: a = 5.14, b = 8.93, c = 7.37, Z = 2; alpha = 91.8°, beta = 104.5°, gamma = 90.016° V = 327.35 Den(Calc)= 2.62
Help on Crystal System: Crystal System: Triclinic - Pedial H-M Symbol (1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.17(1), 1.49(0.9), 3.58(0.8),
 

Physical Properties of Kaolinite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: White, Brownish white, Grayish white, Yellowish white, Grayish green.
Help on Density: Density: 2.6
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white
 

Optical Properties of Kaolinite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2146,KPDmeas= 0.2163,KC= 0.226
Ncalc = 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.553-1.563, b=1.559-1.569, g=1.56-1.57, bire=0.0070, 2V(Calc)=44, 2V(Meas)=24-50. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): colorless or pale yellow.
Help on Pleochroism (y): Pleochroism (y): buff or dark buff.
 

Calculated Properties of Kaolinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Kaolinite =2.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEKaolinite = 1.48 barns/electron
U=PEKaolinite x rElectron Density= 3.87 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kaolinite is Not Radioactive
 

Kaolinite Classification

Help on  Dana Class: Dana Class: 71.01.01.02 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.01)with 1:1 layers
  (71.01.01)Kaolinite group
 
71.01.01.01 Dickite Al2Si2O5(OH)4 Cc m
 
71.01.01.02 Kaolinite Al2Si2O5(OH)4 P1 1
 
71.01.01.03 Nacrite Al2Si2O5(OH)4 Cc m
 
71.01.01.04 Halloysite Al2Si2O5(OH)4 Cc m
 
71.01.01.04a Endellite? Al2Si2O5(OH)4•2(H2O) Cc m
 
71.01.01.05 Odinite (Fe,Mg,Al,Fe,Ti,Mn)2.5(Si,Al)2O5(OH)4 Cm m
Help on  Strunz Class: Strunz Class: 09.ED.05 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.ED -Phyllosilicates with kaolinite layers
 
09.ED.05 Dickite Al2Si2O5(OH)4 Cc m
 
09.ED.05 Kaolinite Al2Si2O5(OH)4 P1 1
 
09.ED.05 Nacrite Al2Si2O5(OH)4 Cc m
 

Other Kaolinite Information

Help on See Also: See Also: Links to other databases for Kaolinite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - GeoScienceWorld
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - Scandinavian mineral gallery
20 - WWW-MINCRYST

Search for Kaolinite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Kaolinite :

Ask about Kaolinite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Kaolinite Specimen Label here :

Kaolinite

Al2Si2O5(OH)4
Dana No: 71.01.01.02 Strunz No: 09.ED.05
Locality:

 

Notes:

 

 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.