Kaolinite Mineral Data (original) (raw)
General Kaolinite Information
Al2Si2O5(OH)4
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
Al2Si2O5(OH)4
Secondary mineral derived from the wathering of alumino-silicate minerals.
Valid Species (Pre-IMA) 1930
Kao-Ling, China. Link to MinDat.org Location Data.
Named after the locality.
Pianlinite - Disordered
Kaolinite 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 |
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Kaolinite Crystallography
a:b:c =0.5755:1:0.8253
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
Triclinic - PedialH-M Symbol (1) Space Group: P1
By Intensity(I/Io): 7.17(1), 1.49(0.9), 3.58(0.8),
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| | Bish D L , Von Dreele R B , Clays and Clay Minerals , 37 (1989) p.289-296, Rietveld refinement of non-hydrogen atomic positions in kaolinite, Locality: Keokuk, Iowa, USA, Note: clay View Additional jPOWD Structure files for Kaolinite [1] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
Physical Properties of Kaolinite
{001} Perfect
White, Brownish white, Grayish white, Yellowish white, Grayish green.
2.6
Transparent to translucent
Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
1.5-2 - Talc-Gypsum
Non-fluorescent.
Earthy (Dull)
white
Optical Properties of Kaolinite
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
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.
colorless or pale yellow.
buff or dark buff.
Calculated Properties of Kaolinite
Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Kaolinite =2.60 gm/cc.
Fermion Index = 0.01
Boson Index = 0.99
PEKaolinite = 1.48 barns/electron
U=PEKaolinite x rElectron Density= 3.87 barns/cc.
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kaolinite is Not Radioactive
Kaolinite Classification
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
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
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
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Ask about Kaolinite here :
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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: