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Lesukite Mineral Data

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General Lesukite Information

Help on Chemical  Formula: Chemical Formula: Al2(OH)5Cl•2(H2O)
Help on Composition: Composition: Molecular Weight = 210.48 gm
   Aluminum  25.64 %  Al   48.44 % Al2O3
   Hydrogen   4.31 %  H    38.52 % H2O
   Chlorine  16.84 %  Cl   16.84 % Cl
               -   %   Cl   -3.80 % -O=Cl2   
   Oxygen    53.21 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al2(OH)5Cl•2(H2O)
Help on Environment: Environment: The result of interaction of fumarole gases and volcanic rocks at 50 deg C.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: The Tolbachik Main Fracture eruption, Kamchatka, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Grigorii Ivanovich Lesuke (1935�1995), technical worker in the Department of Crystallography, University of St. Petersburg, Russia.
Help on Name Pronunciation: Name Pronunciation: Lesukite Say LESUKITE
Help on Synonym: Synonym: IMA1996-004

Lesukite Image

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Comments: Yellow to orange-yellow lesukite.
Location: Deutschlandschacht Mine, Oelsnitz, Zwickau, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Lesukite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 19.878, Z = 36; V = 7,854.49 Den(Calc)= 1.60
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.706(1), 2.446(0.8), 8.11(0.7),

Physical Properties of Lesukite

Help on Color: Color: Yellowish orange, Yellowish brown.
Help on Density: Density: 1.87
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellowish orange

Optical Properties of Lesukite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.186 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3375,KPDmeas= 0.2888,KC= 0.2845
Ncalc = 1.46 - 1.53
Help on Optical Data: Optical Data: Isotropic, n=1.53-1.55.

Calculated Properties of Lesukite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.92 gm/cc
note: Specific Gravity of Lesukite =1.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002618677
Boson Index = 0.9997381323
Help on Photoelectric: Photoelectric: PELesukite = 1.91 barns/electron
U=PELesukite x rElectron Density= 3.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lesukite is Not Radioactive

Lesukite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.05)where Am (O,OH)p Xq
  (10.05.01)Dana Group Cadwaladerite Al(OH)2Cl•4(H2O) None Lesukite! Al2(OH)5Cl•2(H2O) I m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 03.BD.10 03 - HALIDES
  03.B - Simple Halides, with H2O
  03.BD -Simple Halides with H2O and additional OH
03.BD.10 Lesukite! Al2(OH)5Cl•2(H2O) I m3m 4/m 3 2/m

Other Lesukite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p654,1998) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Lesukite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 03.BD.10





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