Koenenite Mineral Data + 
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- 10.6.2.1 Koenenite Na4Mg4Cl12·Mg5Al4(OH)22 R 3m 3 2/m
- III/C.08-10 Carnallite KMgCl3·6(H2O) Pcna 2/m 2/m 2/m
- III/C.08-20 Koenenite Na4Mg4Cl12·Mg5Al4(OH)22 R 3m 3 2/m
- III/C.08-30 Tachyhydrite CaMg2Cl6·12(H2O) P 3 3
General Koenenite Information |
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 Chemical Formula: |
Na4Mg4Cl12·Mg5Al4(OH)22 | ||
| Composition: |
Molecular Weight = 1,218.22 gm | ||
| Sodium 7.55 % Na 10.18 % Na2O | |||
| Magnesium 17.96 % Mg 29.78 % MgO | |||
| Aluminum 8.86 % Al 16.74 % Al2O3 | |||
| Hydrogen 1.82 % H 16.27 % H2O | |||
| Chlorine 34.92 % Cl 34.92 % Cl | |||
| - % Cl -7.88 % -O=Cl2 | |||
| Oxygen 28.89 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Na4Mg9Cl12Al4(OH)22 | ||
| Environment: |
Potash mine. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1902 | ||
| Locality: |
Justus I near Volpriehausen, and elsewhere in Hannover, Germany. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Adolf von Koenen (1837-1915), German geologist of Gottingen, who first found the mineral. | ||
| Synonym: |
ICSD 22305/6 | ||
| PDF 43-684 | |||
Koenenite Image | |||
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Images:
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Koenenite Crystallography |
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| Axial Ratios: |
a:c = 1:0.94009 | ||
| Cell Dimensions: |
a = 34.72, c = 32.64, Z = 33; V = 34,075.35 Den(Calc)= 1.96 | ||
| Crystal System: |
Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.5(1), 2.34(0.5), 2.85(0.5), | ||
Physical Properties of Koenenite |
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| Cleavage: |
[0001] Perfect | ||
| Color: |
Colorless, Light yellow, Dark red. | ||
| Density: |
1.98 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Fracture: |
Flexible - Flexible fragments. | ||
| Habit: |
Encrustations - Forms crust-like aggregates on matrix. | ||
| Hardness: |
1.5 - Between Talc and Gypsum | ||
| Luster: |
Pearly | ||
| Streak: |
white | ||
Optical Properties of Koenenite |
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| Gladstone-Dale: |
CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.273,KPDmeas= 0.2702,KC= 0.2792 |
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| Optical Data: |
Uniaxial (+), w=1.52, e=1.55, bire=0.0300. | ||
Calculated Properties of Koenenite |
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| Electron Density: |
relectron=1.95 gm/cc |
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| Fermion Index |
Fermion Index = 0.01809 Boson Index = 0.98191 |
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| Photoelectric: |
PEKoenenite = 3.06 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Koenenite is Not Radioactive |
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Koenenite Classification |
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| Dana Class: |
10.6.2.1 (10)Oxyhalides and Hydroxyhalides | ||
| (10.6)where Am Bn (O,OH)p Xq | |||
| (10.6.2)Dana Group | |||
| Strunz Class: |
III/C.08-20 III - Halogenides | ||
| III/C - Double halogenides with water, Chlorides | |||
| III/C.08 - Carnallite - Tachyhydrite series | |||
Other Koenenite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Koenenite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Koenenite using: Visit our Advertisers for Koenenite : Translate Koenenite Mineral Data : Ask about Koenenite here : Print or Cut-and-Paste your Koenenite Specimen Label here :
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