Lesukite Mineral Data (original) (raw)
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
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 (1935�1995), technical worker in the Department of Crystallography, University of St. Petersburg, Russia.
Name Pronunciation:
Lesukite 
Synonym:
IMA1996-004
Lesukite Image
Images:
Lesukite Crystallography
Cell Dimensions:
a = 19.878, Z = 36; V = 7,854.49 Den(Calc)= 1.60
Crystal System:
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I m3m
X Ray Diffraction:
By Intensity(I/Io): 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:
PELesukite = 1.91 barns/electron
U=PELesukite 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: