Mummeite Mineral Data

General Mummeite Information

Chemical Formula:

Cu0.58Ag3.11Pb1.10Bi6.65S13

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 %

Empirical Formula:

Cu_0.58Ag_3.11Pb_1.1Bi_6.65S₁₃

IMA Status:

Approved IMA 1986

Locality:

Alaska mine, Poughkeepsie Gulch, Silverton, Colorado, United States. Link to MinDat.org Location Data.

Name Origin:

Named in 1986 for William G. Mumme (b.1936), Australian mineralogist.

Name Pronunciation:

Mummeite

Synonym:

IMA1986-025

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Mummeite Crystallography

Axial Ratios:

a:b:c =3.3177:1:5.3275

Cell Dimensions:

a = 13.47, b = 4.06, c = 21.63, Z = 2; beta = 92.9° V = 1,181.39 Den(Calc)= 6.77

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.023(1), 2.863(1), 3.53(0.5),

Physical Properties of Mummeite

Cleavage:

None

Color:

Silver gray.

Density:

6.64

Diaphaneity:

Opaque

Hardness:

4 - Fluorite

Luster:

Metallic

Calculated Properties of Mummeite

Electron Density:

Bulk Density (Electron Density)=5.70 gm/cc
note: Specific Gravity of Mummeite =6.77 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Mummeite=1,315.97 barns/electron
U=PE_Mummeite x rElectron Density=7,500.49 barns/cc.

Radioactivity:

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

Mummeite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.78,p847,1993)

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: