Mineralogy Database

Stalderite Mineral Data

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General Stalderite Information

Help on Chemical  Formula: Chemical Formula: TlCu(Zn,Fe,Hg)2As2S6
Help on Composition: Composition: Molecular Weight = 761.31 gm
   Thallium  26.85 %  Tl
   Zinc       9.45 %  Zn
   Iron       5.13 %  Fe
   Copper     8.35 %  Cu
   Mercury    5.27 %  Hg
   Arsenic   19.68 %  As
   Sulfur    25.27 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: TlCuZn1.1Fe2+0.7Hg0.2As2S6
Help on Environment: Environment: In small cavities of hydrothermal origin in Triassic dolomite.
Help on IMA Status: IMA Status: Approved IMA 1993
Help on Locality: Locality: Lengenbach, Binntal, Canton Wallis, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Prof. Dr. Hans A. Stalder (1925-) of the Natural History Museum, Berne, Switzerland.
Help on Name Pronunciation: Name Pronunciation: Stalderite + Pronunciation Say STALDERITE
Help on Synonym: Synonym: ICSD 81209
  PDF 49-1837

Stalderite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.10979
Help on Cell Dimensions: Cell Dimensions: a = 9.855, c = 10.937, Z = 4; V = 1,062.21 Den(Calc)= 4.76
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.94(1), 4.086(0.51), 2.436(0.39),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 0 1) ( 1 1 2) ( 1 2 1) ( 1 1 0) ( 1 0 0)

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Physical Properties of Stalderite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black, Reddish black, Bluish black.
Help on Density: Density: 4.97
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Streak: Streak: brownish red

Calculated Properties of Stalderite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.24 gm/cc
note: Specific Gravity of Stalderite =4.76 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEStalderite = 553.24 barns/electron
U=PEStalderite x rElectron Density=2,346.63 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stalderite is Not Radioactive

Stalderite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.04.11)Dana Group Routhierite TlCu(Hg,Zn)2(As,Sb)2S3 I 4mm 4mm Stalderite TlCu(Zn,Fe,Hg)2As2S6 I 42m 4 2m Quadratite! Ag(Cd,Pb)AsS3 I 4/amd 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.GA.40 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.G - Sulfarsenites, sulfantimonites, sulfbismuthites
  02.GA -Neso-sulfarsenites, etc., without additional S
02.GA.40 Routhierite TlCu(Hg,Zn)2(As,Sb)2S3 I 4mm 4mm
02.GA.40 Stalderite TlCu(Zn,Fe,Hg)2As2S6 I 42m 4 2m

Other Stalderite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.78,p846,1993)
Help on See Also: See Also: Links to other databases for Stalderite :
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: 02.GA.40





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