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Thorikosite Mineral Data

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General Thorikosite Information

Help on Chemical  Formula: Chemical Formula: Pb3(Sb+++,As+++)O3(OH)Cl2
Help on Composition: Composition: Molecular Weight = 867.55 gm
   Antimony  10.53 %  Sb   12.60 % Sb2O3
   Arsenic    2.16 %  As    2.85 % As2O3
   Hydrogen   0.12 %  H     1.04 % H2O
   Lead      71.65 %  Pb   77.18 % PbO
   Chlorine   8.17 %  Cl    8.17 % Cl
               -   %   Cl   -1.84 % -O=Cl2   
   Oxygen     7.38 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb3(SbO3)0.75(AsO3)0.25(OH)Cl2
Help on Environment: Environment: Sea water altered metallugical slags.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Thorikos, near the Laurium mines. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Thorikosite + Pronunciation Say THORIKOSITE
Help on Synonym: Synonym: ICSD 62160
  PDF 38-403

Thorikosite Image

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Comments: Yellow, prismatic crystals of Thorikosite on matrix.
Location: Passa Limani Cove slag locality, Passa Limani area, Lavrion District, Attikí (Attica; Attika) Prefecture, Greece. Scale: Picture size 1.6 mm.
© Thomas Witzke / Abraxas-Verlag

Thorikosite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.27991
Help on Cell Dimensions: Cell Dimensions: a = 3.919, c = 12.854, Z = 1; V = 197.42 Den(Calc)= 7.30
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.891(1), 3.754(0.7), 2.775(0.5),

Physical Properties of Thorikosite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Light yellow.
Help on Density: Density: 7.24
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Thorikosite

Help on Optical Data: Optical Data: NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.1643) where Ncalc=Dcalc*KC+1
NCalc= 2.19 - from Gladstone-Dale relationship (KC = 0.1643) where Ncalc=Dmeas*KC+1

Calculated Properties of Thorikosite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.05 gm/cc
note: Specific Gravity of Thorikosite =7.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEThorikosite =1,366.80 barns/electron
U=PEThorikosite x rElectron Density=8,269.13 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thorikosite is Not Radioactive

Thorikosite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.02)where A (O,OH) Xq
  (10.02.06)Dana Group Thorikosite Pb3(Sb,As)O3(OH)Cl2 I 4/mmm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 03.DC.40 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DC -With Pb (As,Sb,Bi), without Cu
03.DC.40 Thorikosite Pb3(Sb,As)O3(OH)Cl2 I 4/mmm 4/m 2/m 2/m

Other Thorikosite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Thorikosite :
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.DC.40





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