Mineralogy Database

Mummeite Mineral Data

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General Mummeite Information

Help on Chemical  Formula: Chemical Formula: Cu0.58Ag3.11Pb1.10Bi6.65S13
Help on Composition: Composition: Molecular Weight = 2,406.82 gm
   Copper    1.53 %  Cu
   Silver   13.94 %  Ag
   Bismuth  57.74 %  Bi
   Lead      9.47 %  Pb
   Sulfur   17.32 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu0.58Ag3.11Pb1.1Bi6.65S13
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Alaska mine, Poughkeepsie Gulch, Silverton, Colorado, United States. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1986 for William G. Mumme (b.1936), Australian mineralogist.
Help on Name Pronunciation: Name Pronunciation: Mummeite Say MUMMEITE
Help on Synonym: Synonym: IMA1986-025
 

Mummeite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.3177:1:5.3275
Help on Cell Dimensions: Cell Dimensions: a = 13.47, b = 4.06, c = 21.63, Z = 2; beta = 92.9° V = 1,181.39 Den(Calc)= 6.77
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.023(1), 2.863(1), 3.53(0.5),
 

Physical Properties of Mummeite

Help on Cleavage: Cleavage: None
Help on Color: Color: Silver gray.
Help on Density: Density: 6.64
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Metallic
 

Calculated Properties of Mummeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.70 gm/cc
note: Specific Gravity of Mummeite =6.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEMummeite =1,315.97 barns/electron
U=PEMummeite x rElectron Density=7,500.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mummeite is Not Radioactive
 

Mummeite Classification

Help on  Dana Class: Dana Class: 03.08.10.04 (03)Sulfides - Sulfosalts
  (03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.08.10)Pavonite Group (Monoclinic: C/2c bismuth sulfosalts)
 
03.08.10.01 Pavonite (Ag,Cu)(Bi,Pb)3S5 C 2/c 2/m
 
03.08.10.02 Makovickyite Ag1.5Bi5.5S9 C 2/c 2/m
 
03.08.10.03 Benjaminite (Ag,Cu)3(Bi,Pb)7S12 C 2/c 2/m
 
03.08.10.04 Mummeite Cu0.58Ag3.11Pb1.10Bi6.65S13 C 2/c 2/m
 
03.08.10.05 Borodaevite Ag5(Bi,Sb)9S16 C 2/c 2/m
 
03.08.10.06 Cupropavonite AgPbCu2Bi5S10 C 2/c 2/m
 
03.08.10.07 Cupromakovickyite! Cu4AgPb2Bi9S18 C 2/m 2/m
 
03.08.10.08 Kudriavite! (Cd,Pb)Bi2S4 C 2/m 2/m
 
03.08.10.09 IMA2008-058! Ag5Bi13S22 C 2/m 2/m
 
03.08.10.10 IMA2005-036! Cu8Pb4Ag3Bi19S38 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.JA.05f 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JA -Galena derivatives with little or no Pb
 
02.JA.05f Mummeite Cu0.58Ag3.11Pb1.10Bi6.65S13 C 2/c 2/m
 

Other Mummeite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.78,p847,1993)
Help on See Also: See Also: Links to other databases for Mummeite :
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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Print or Cut-and-Paste your Mummeite Specimen Label here :

Mummeite

Cu0.58Ag3.11Pb1.10Bi6.65S13
Dana No: 03.08.10.04 Strunz No: 02.JA.05f
Locality:

 

Notes:

 

 
   
 


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