Mineralogy Database

Steropesite Mineral Data

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General Steropesite Information

Help on Chemical  Formula: Chemical Formula: Tl3BiCl6
Help on Composition: Composition: Molecular Weight = 1,077.12 gm
   Sodium     0.02 %  Na    0.03 % Na2O
   Thallium  54.84 %  Tl   56.98 % Tl2O
   Bismuth   23.48 %  Bi   26.17 % Bi2O3
   Bromine    4.15 %  Br    4.15 % Br
               -   %   Br   -0.42 % -O=Br2   
   Chlorine  17.51 %  Cl   17.51 % Cl
               -   %   Cl   -3.95 % -O=Cl2   
            ______        ______ 
            100.00 %      100.48 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Tl2.89Na0.01Bi1.21Cl5.32Br0.56
Help on Environment: Environment: Found in an active high-temperature fumarole (~450 deg. C).
Help on IMA Status: IMA Status: Approved IMA 2008 (Dana # Added)
Help on Locality: Locality: La Fossa crater, Vulcano, Aeolian Islands, Italy Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Name is after Steropes, one of the three Cyclops and a son of Uranus. This mythological half-god was a helper of Hephaistos, the ancient Greek god of fire.
Help on Synonym: Synonym: IMA2008-014

Steropesite Image

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Comments: SEM-BSE image of steropesite showing a more complex habit of some crystals. (CanMin, v47:373).
Location: La Fossa crater, Vulcano, Aeolian Islands, Italy. Scale: See Image.
© Canadian Mineralogist

Steropesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7641:1:0.8603
Help on Cell Dimensions: Cell Dimensions: a = 26.686, b = 15.127, c = 13.014, Z = 16; beta = 108.11° V = 4,993.23 Den(Calc)= 5.73
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.773(1), 2.113(0.93), 3.846(0.4),2.71(0.35), 2.745(0.3), 3.884(0.3), 4.241(0.29), 2.801(0.27),

Physical Properties of Steropesite

Help on Cleavage: Cleavage: None
Help on Color: Color: Pale lemon yellow.
Help on Fracture: Fracture: Unknown - Minerals too small to observe fractures.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: white

Optical Properties of Steropesite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1693,KC= 0.17
Ncalc = 1.97
Help on Optical Data: Optical Data: Biaxial (?), b=1.97

Calculated Properties of Steropesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.73 gm/cc
note: Specific Gravity of Steropesite =5.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 2.347618E-7
Boson Index = 0.9999997652
Help on Photoelectric: Photoelectric: PESteropesite =1,439.77 barns/electron
U=PESteropesite x rElectron Density=6,811.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Steropesite is Not Radioactive

Steropesite Classification

Help on  Dana Class: Dana Class: (11)Halide Complexes; Alumino-fluorides
  (11.05)where (A)m B (X)6
  (11.05.08)Challacolloite Group Challacolloite! KPb2Cl5 P 21/c 2/m Hephaistosite! TlPb2Cl5 P 21/c 2/m Steropesite! Tl3BiCl6 Cc m Panichiite! (NH4)2SnCl6 Fm3m 4 3m
Help on  Strunz Class: Strunz Class: 03.C 03 - HALIDES
  03.C - Complex Halides
  03.C -
03.C Steropesite! Tl3BiCl6 Cc m
03.C IMA2008-032 CuCl2•2NH3 C mcm 2/m 2/m 2/m
03.C IMA2008-039 (NH4)3PbCl5 P nma 2/m 2/m 2/m

Other Steropesite Information

Help on References: References: NAME( CanMin, v47:373) PHYS. PROP.(CanMin, v47:373) OPTIC PROP.(CanMin, v47:373)
Help on See Also: See Also: Links to other databases for Steropesite :
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.C





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