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Koenenite Mineral Data
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General Koenenite Information
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 Chemical Formula: |
Na4Mg4Cl12•Mg5Al4(OH)22 |
| Composition: |
Molecular Weight = 1,218.22 gm |
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Sodium 7.55 % Na 10.18 % Na2O |
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Magnesium 17.96 % Mg 29.78 % MgO |
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Aluminum 8.86 % Al 16.74 % Al2O3 |
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Hydrogen 1.82 % H 16.27 % H2O |
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Chlorine 34.92 % Cl 34.92 % Cl |
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- %
Cl -7.88 % -O=Cl2 |
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Oxygen 28.89 % O |
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______ ______ |
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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. |
| Name Pronunciation: |
Koenenite + Pronunciation  |
| Synonym: |
ICSD 22305/6 |
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PDF 43-684 |
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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 Scalenohedral H-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), |
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Physical Properties of Koenenite
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| Cleavage: |
{0001} Perfect |
| Color: |
Colorless, Light yellow, Dark red. |
| Density: |
1.98 |
| Diaphaneity: |
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 |
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Optical Properties of Koenenite
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| Optical Data: |
Uniaxial (+), w=1.52, e=1.55, bire=0.0300. |
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Calculated Properties of Koenenite
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| Electron Density: |
Bulk Density (Electron Density)=1.95 gm/cc
note: Specific Gravity of Koenenite =1.96 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEKoenenite = 3.06 barns/electron
U=PEKoenenite x rElectron Density= 5.96 barns/cc.
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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: |
10.06.02.01 (10)Oxyhalides and Hydroxyhalides |
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(10.06)where Am Bn (O,OH)p Xq |
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(10.06.02)Dana Group |
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10.06.02.01 Koenenite Na4Mg4Cl12•Mg5Al4(OH)22 R 3m 3 2/m |
| Strunz Class: |
03.BD.25 03 - HALIDES |
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03.B - Simple Halides, with H2O |
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03.BD -Simple Halides with H2O and additional OH |
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03.BD.25 Koenenite Na4Mg4Cl12•Mg5Al4(OH)22 R 3m 3 2/m |
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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 - 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
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Print or Cut-and-Paste your Koenenite Specimen Label here :
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Koenenite
Na4Mg4Cl12•Mg5Al4(OH)22
Dana No: 10.06.02.01 Strunz No: 03.BD.25
Locality:
Notes:
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