Lesukite Mineral Data

General Lesukite Information

Chemical Formula:

Al2(OH)5Cl•2(H2O)

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

Empirical Formula:

Al₂(OH)₅Cl•2(H₂O)

Environment:

The result of interaction of fumarole gases and volcanic rocks at 50 deg C.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

The Tolbachik Main Fracture eruption, Kamchatka, Russia. Link to MinDat.org Location Data.

Name Origin:

Named after Grigorii Ivanovich Lesuke (1935ï¿½1995), technical worker in the Department of Crystallography, University of St. Petersburg, Russia.

Name Pronunciation:

Lesukite

Synonym:

IMA1996-004

Lesukite Image

Images:

Lesukite

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

Lesukite Crystallography

Cell Dimensions:

a = 19.878, Z = 36; V = 7,854.49 Den(Calc)= 1.60

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/I_o): 2.706(1), 2.446(0.8), 8.11(0.7),

Physical Properties of Lesukite

Color:

Yellowish orange, Yellowish brown.

Density:

1.87

Diaphaneity:

Transparent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Tabular - Form dimensions are thin in one direction.

Luster:

Vitreous (Glassy)

Streak:

yellowish orange

Optical Properties of Lesukite

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

Optical Data:

Isotropic, n=1.53-1.55.

Calculated Properties of Lesukite

Electron Density:

Bulk Density (Electron Density)=1.92 gm/cc
note: Specific Gravity of Lesukite =1.87 gm/cc.

Fermion Index:

Fermion Index = 0.0002618677
Boson Index = 0.9997381323

Photoelectric:

PE_Lesukite= 1.91 barns/electron
U=PE_Lesukite x rElectron Density= 3.66 barns/cc.

Radioactivity:

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

Lesukite Classification

Dana Class:

10.05.01.02 (10)Oxyhalides and Hydroxyhalides

(10.05)where Am (O,OH)p Xq

(10.05.01)Dana Group

10.05.01.01 Cadwaladerite Al(OH)2Cl•4(H2O) None

10.05.01.02 Lesukite! Al2(OH)5Cl•2(H2O) I m3m 4/m 3 2/m

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

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p654,1998) OPTIC PROP.(MinRec)

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

Lesukite

Al2(OH)5Cl•2(H2O)
Dana No: 10.05.01.02 Strunz No: 03.BD.10
Locality:

Notes:

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