Kulkeite Mineral Data

Advertisment

A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

General Kulkeite Information

Chemical Formula:

Na0.35Mg8AlSi7O20(OH)10

Composition:

Molecular Weight = 942.67 gm

Sodium 0.85 % Na 1.15 % Na₂O

Magnesium 20.63 % Mg 34.20 % MgO

Aluminum 6.87 % Al 12.98 % Al₂O₃

Silicon 19.66 % Si 42.07 % SiO₂

Hydrogen 1.07 % H 9.56 % H₂O

Oxygen 50.92 % O

______ ______

100.00 % 99.96 % = TOTAL OXIDE

Empirical Formula:

Na_0.35Mg₈Al_2.4Si_6.6O₂₀(OH)₁₀

Environment:

Meta-evaporite sequence.

IMA Status:

Approved IMA 1980

Locality:

El Mourdur Hill, near Derran, 35 km W of Ksar El Boukhari, Tell Atlas Mountians, Algeria. Link to MinDat.org Location Data.

Name Origin:

Named for Holger Kulke, geologist, Essen, Germany.

Name Pronunciation:

Kulkeite

Search for Kulkeite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Kulkeite Crystallography

Axial Ratios:

a:b:c =0.5784:1:2.5989

Cell Dimensions:

a = 5.319, b = 9.195, c = 23.897, Z = 2; beta = 97.1° V = 1,159.80 Den(Calc)= 2.70

Crystal System:

MonoclinicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.9(1), 3.38(0.8), 11.9(0.8),

Physical Properties of Kulkeite

Cleavage:

{001} Perfect

Color:

Colorless.

Density:

2.7

Diaphaneity:

Transparent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2 - Gypsum

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Kulkeite

Gladstone-Dale:

CI meas= 0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2066,KPDmeas= 0.2066,KC= 0.2175
Ncalc = 1.59

Optical Data:

Biaxial (-), a=1.552, b=1.5605, g=1.561, bire=0.0090, 2V(Calc)=26, 2V(Meas)=24. Dispersion r < v.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Kulkeite

Electron Density:

Bulk Density (Electron Density)=2.71 gm/cc
note: Specific Gravity of Kulkeite =2.70 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Kulkeite= 1.45 barns/electron
U=PE_Kulkeite x rElectron Density= 3.93 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kulkeite is Not Radioactive

Kulkeite Classification

Dana Class:

71.04.02.06 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.04)interlayered 1:1, 2:1, and octahedra

(71.04.02)Interstratified Chlorite-Smectite group

71.04.02.01 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

71.04.02.02 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono

71.04.02.03 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m

71.04.02.04 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O) Unk Ortho

71.04.02.05 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O) Unk Ortho

71.04.02.06 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono

71.04.02.07 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) Unk Mono

71.04.02.08 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2•n(H2O) Unk Mono

71.04.02.09 Glagolevite! NaMg6[Si3AlO10](OH,O)8•H2O C1 1

Strunz Class:

09.EC.60 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.60 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2•n(H2O) Unk Mono

09.EC.60 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

09.EC.60 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O) Unk Ortho

09.EC.60 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono

09.EC.60 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono

09.EC.60 Illite* (K,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)] C 2/m 2/m

09.EC.60 Hydrobiotite [K(Mg,Fe)3(Al,Fe)Si3O10(OH,F)2]•[(Mg,Fe,Al)3(Si,Al)4O10(OH)2•4(H2O)] C 2/m 2/m

09.EC.60 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono

09.EC.60 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) Unk Mono

09.EC.60 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m

09.EC.60 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O) Unk Ortho

09.EC.60 Brinrobertsite! (Na,K,Ca)x(Al,Fe,Mg)4(Si,Al)8O20(OH)4•3.54(H2O)[x=0.35,n=3.54] pseudo 2/m 2/m

Other Kulkeite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic2)

See Also:

Links to other databases for Kulkeite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Kulkeite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Kulkeite :

A Bijoux Google Search for Kulkeite
Adam's Minerals Google Search for Kulkeite
Cape Minerals Google Search for Kulkeite
Dakota Matrix Minerals Google Search for Kulkeite
Excalibur Mineral Corp. Google Search for Kulkeite
Exceptional Minerals Google Search for Kulkeite
John Betts Fine Minerals Search for Kulkeite
McDougall Minerals Google Search for Kulkeite
Mineral News Website Link
Rock and Mineral Shows Google Search for Kulkeite
Weinrich Minerals, Inc. Google Search for Kulkeite

Ask about Kulkeite 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 Español

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

Kulkeite

Na0.35Mg8AlSi7O20(OH)10
Dana No: 71.04.02.06 Strunz No: 09.EC.60
Locality:

Notes: