Wallisite Mineral Data (original) (raw)

General Wallisite Information

Help on Chemical Formula: Chemical Formula:

PbTl(Cu,Ag)As2S5

Help on Composition: Composition:

Molecular Weight = 796.38 gm

Thallium 25.66 % Tl

Copper 5.98 % Cu

Silver 3.39 % Ag

Arsenic 18.82 % As

Lead 26.02 % Pb

Sulfur 20.13 % S

______

100.00 %

Help on Empirical Formula: Empirical Formula:

PbTlCu0.75Ag0.25As2S5

Help on Environment: Environment:

Overgrowing other lead sulfosalts.

Help on IMA Status: IMA Status:

Approved IMA 1968

Help on Locality: Locality:

Lengenbach, Binntal, Valais (Wallis), Switzerland. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Wallis, the German name for the Swiss Canton in which the Lengenbach quarry is located.

Help on Name Pronunciation: Name Pronunciation:

Wallisite + Pronunciation Say WALLISITE

Help on Synonym: Synonym:

ICSD 26804

PDF 25-294

Wallisite Image

Click Here for Larger Wallisite Image in a New Browser Window Images:

Click Here for Larger Wallisite Image Wallisite Comments: Gray black, blocky crystalline aggregate of wallisite on striated sulfosalt (dufrénoysite?). Location: Lengenbach quarry, Binntal, Valais, Switzerland.Scale: Aggregate 5 mm. © Walter Gabriel

Wallisite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.8887:1:0.8643

Help on Cell Dimensions: Cell Dimensions:

a = 7.98, b = 8.979, c = 7.761, Z = 2; alpha = 106.11°, beta = 114.48°, gamma = 65.48° V = 442.38 Den(Calc)= 5.98

Help on Crystal System: Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.305(1), 2.864(0.84), 3.328(0.82),

Click Here for Large Wallisite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Help on Above

| | Takeuchi Y , Ohmasa M , Zeitschrift fur Kristallographie , 127 (1968) p.349-365, The crystal structure of wallisite, PbTlCuAs2S5,, the Cu analogue of hatchite PbTlAgAs2S5, Locality: Lengenbach quarry, Binnatal, Switzerland | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Wallisite

Help on Cleavage: Cleavage:

{001} Good

Help on Color: Color:

Lead gray, Black.

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Habit: Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Help on Luster: Luster:

Metallic

Calculated Properties of Wallisite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=4.98 gm/cc
note: Specific Gravity of Wallisite =5.79 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Help on Photoelectric: Photoelectric:

PEWallisite = 930.43 barns/electron
U=PEWallisite x rElectron Density=4,633.74 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wallisite is Not Radioactive

Wallisite Classification

Help on Dana Class: Dana Class:

03.05.08.01 (03)Sulfides - Sulfosalts

(03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.05.08)Dana Group

03.05.08.01 Wallisite PbTl(Cu,Ag)As2S5 P1 1

03.05.08.02 Hatchite (Pb,Tl)2AgAs2S5 P1 or P1 1

Help on Strunz Class: Strunz Class:

02.GC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.G - Sulfarsenites, sulfantimonites, sulfbismuthites

02.GC -Poly-sulfarsenites

02.GC.05 Hatchite (Pb,Tl)2AgAs2S5 P1 or P1 1

02.GC.05 Wallisite PbTl(Cu,Ag)As2S5 P1 1

Other Wallisite Information

Help on References: References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Wallisite :
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
15 - WWW-MINCRYST

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Ask about Wallisite here :
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Print or Cut-and-Paste your Wallisite Specimen Label here :

Wallisite

PbTl(Cu,Ag)As2S5
Dana No: 03.05.08.01 Strunz No: 02.GC.05
Locality:

Notes: