Mineralogy Database

Koenenite Mineral Data

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General Koenenite Information

Help on Chemical  Formula: Chemical Formula: Na4Mg4Cl12•Mg5Al4(OH)22
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Na4Mg9Cl12Al4(OH)22
Help on Environment: Environment: Potash mine.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1902
Help on Locality: Locality: Justus I near Volpriehausen, and elsewhere in Hannover, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Adolf von Koenen (1837-1915), German geologist of Gottingen, who first found the mineral.
Help on Name Pronunciation: Name Pronunciation: Koenenite + Pronunciation Say KOENENITE
Help on Synonym: Synonym: ICSD 22305/6
  PDF 43-684

Koenenite Image

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Comments: Koenenite with cleavage planes.
Location: Bergmannssegen-Hugo Mine, Lehrte, near Hanover, Lower Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Koenenite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.94009
Help on Cell Dimensions: Cell Dimensions: a = 34.72, c = 32.64, Z = 33; V = 34,075.35 Den(Calc)= 1.96
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.5(1), 2.34(0.5), 2.85(0.5),

Physical Properties of Koenenite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Colorless, Light yellow, Dark red.
Help on Density: Density: 1.98
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Koenenite

Help on Optical Data: Optical Data: Uniaxial (+), w=1.52, e=1.55, bire=0.0300.

Calculated Properties of Koenenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.95 gm/cc
note: Specific Gravity of Koenenite =1.96 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEKoenenite = 3.06 barns/electron
U=PEKoenenite x rElectron Density= 5.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Koenenite is Not Radioactive

Koenenite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.06)where Am Bn (O,OH)p Xq
  (10.06.02)Dana Group Koenenite Na4Mg4Cl12•Mg5Al4(OH)22 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 03.BD.25 03 - HALIDES
  03.B - Simple Halides, with H2O
  03.BD -Simple Halides with H2O and additional OH
03.BD.25 Koenenite Na4Mg4Cl12•Mg5Al4(OH)22 R 3m 3 2/m

Other Koenenite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 03.BD.25





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