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Felbertalite Mineral Data
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General Felbertalite Information
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 Chemical Formula: |
Cu2Pb6Bi8S19 |
| Composition: |
Molecular Weight = 3,599.51 gm |
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Cadmium 0.31 % Cd |
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Copper 3.53 % Cu |
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Silver 1.20 % Ag |
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Bismuth 48.19 % Bi |
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Lead 29.93 % Pb |
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Sulfur 16.84 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu2Ag0.4Cd0.1Pb5.2Bi8.3S18.9 |
| Environment: |
Quartz-scheelite discordant ore veins. Structure related to junoite. |
| IMA Status: |
Approved IMA 1999 (Dana # Added) |
| Locality: |
Felbertal valley, Salzburg Province, Austria. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
ICSD 411110 |
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IMA1999-042 |
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Felbertalite Crystallography
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| Axial Ratios: |
a:b:c =6.824:1:5.1213 |
| Cell Dimensions: |
a = 27.6367, b = 4.0499, c = 20.7409, Z = 2; beta = 131.258° V = 1,745.14 Den(Calc)= 6.85 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 1.791(0.8)(223), 2.32(0.8)(116), 1.744(0.8)(626),2.031(0.8)(020), 2.062(0.8)(117), 2.096(0.8)(11.1.7), 2.918(0.8)(510), 3.382(0.8)(406), 3.507(0.8)(313), |
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Physical Properties of Felbertalite
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| Cleavage: |
{001} Perfect |
| Color: |
Gray. |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
3.5-4 - Copper Penny-Fluorite |
| Luster: |
Metallic |
| Streak: |
grayish black |
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Calculated Properties of Felbertalite
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| Electron Density: |
Bulk Density (Electron Density)=5.71 gm/cc
note: Specific Gravity of Felbertalite =6.85 gm/cc.
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| Fermion Index: |
Fermion Index = 0.06
Boson Index = 0.94 |
| Photoelectric: |
PEFelbertalite =1,489.49 barns/electron
U=PEFelbertalite x rElectron Density=8,499.69 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Felbertalite is Not Radioactive |
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Felbertalite Classification
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| Dana Class: |
03.07.14.02 (03)Sulfides - Sulfosalts |
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(03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.07.14)Dana Group |
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03.07.14.01 Junoite Pb3Cu2Bi8(S,Se)16 C 2/m 2/m |
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03.07.14.02 Felbertalite! Cu2Pb6Bi8S19 C 2/m 2/m |
| Strunz Class: |
02.JB.25b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.J - Sulfosalts of PbS Archetype |
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02.JB -Galena derivatives, with Pb |
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02.JB.25b Felbertalite! Cu2Pb6Bi8S19 C 2/m 2/m |
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Other Felbertalite Information
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| References: |
NAME( AmMin, Vol 87, p 765) PHYS. PROP.(AmMin, Vol 87, p 765) |
| See Also: |
Links to other databases for Felbertalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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Print or Cut-and-Paste your Felbertalite Specimen Label here :
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Felbertalite
Cu2Pb6Bi8S19
Dana No: 03.07.14.02 Strunz No: 02.JB.25b
Locality:
Notes:
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