Thorikosite Mineral Data + Say THORIKOSITE


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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 Synonym: Synonym: ICSD 62160
  PDF 38-403
 

Thorikosite Image

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Thorikosite

Comments: Yellow, prismatic crystals of Thorikosite on matrix.
Location: Passa Limani Cove slag locality, Passa Limani area, Lavrion District, Attik? (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 DipyramidalH-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),
Click Here for Large Thorikosite Structure Window Crystal Structure:

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Rouse R C , Dunn P J , Journal of Solid State Chemistry , 57 (1985) p.389-395, The structure of thorisokite, a naturally occurring member of the bismuth oxyhalide group

 

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:

relectron=6.05 gm/cc
note: rThorikosite =7.30 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.15838
Boson Index = 0.84162
Help on Photoelectric: Photoelectric:

PEThorikosite =1,366.80 barns/electron
U=PEThorikosite x relectron=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: 10.2.6.1 (10)Oxyhalides and Hydroxyhalides
  (10.2)where A (O,OH) Xq
  (10.2.6)Dana Group
 
10.2.6.1 Thorikosite Pb3(Sb,As)O3(OH)Cl2 I 4/mmm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: III/D.11-60 III - Halogenides
  III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds
  III/D.11 - Mendipite - Onoratoite series
 
III/D.11-10 Mendipite Pb3Cl2O2 P 212121 2 2 2
 
III/D.11-15 Damaraite Pb3O2(OH)Cl Pmc2 mm2
 
III/D.11-17 Chubutite* Pb7O6Cl2 Unk Ortho
 
III/D.11-20 Penfieldite Pb2Cl3(OH) P 6/mmm 6/m 2/m 2/m
 
III/D.11-30 Blixite Pb2Cl(O,OH)2 Unk Ortho
 
III/D.11-35 Mereheadite! Pb2O(OH)Cl C 2/c 2/m
 
III/D.11-40 Sundiusite Pb10(SO4)Cl2O8 C 2,Cm,C 2/m Mono
 
III/D.11-50 Asisite Pb12(SiO4)O8Cl4 I 4/mmm 4/m 2/m 2/m
 
III/D.11-55 Parkinsonite (Pb,Mo,[])8O8Cl2 I 4/mmm 4/m 2/m 2/m
 
III/D.11-60 Thorikosite Pb3(Sb,As)O3(OH)Cl2 I 4/mmm 4/m 2/m 2/m
 
III/D.11-65 Philolithite! Pb12O6Mn(Mg,Mn)2(Mn,Mg)4(SO4)(CO3)4Cl4(OH)12 P 41/nnm 4/m 2/m 2/m
 
III/D.11-70 Pinalite Pb3(WO4)OCl2 Amam 2/m 2/m 2/m
 
III/D.11-80 Nadorite PbSbO2Cl Bmmb 2/m 2/m 2/m
 
III/D.11-90 Perite PbBiO2Cl Bmmb 2/m 2/m 2/m
 
III/D.11-100 Heliophyllite Pb6As2O7Cl4 Unk Ortho
 
III/D.11-110 Ecdemite Pb6As2O7Cl4 Unk Tetra
 
III/D.11-120 Onoratoite Sb8O11Cl2 C 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Thorikosite

Pb3(Sb+++,As+++)O3(OH)Cl2
Dana No: 10.2.6.1 Strunz No: III/D.11-60
Locality:

 

Notes:

 

 
   
 
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