Goldfieldite Mineral Data

General Goldfieldite Information

Chemical Formula:

Cu12(Te,Sb,As)4S13

Composition:

Molecular Weight = 1,665.23 gm

Copper 45.79 % Cu

Antimony 4.39 % Sb

Tellurium 22.99 % Te

Arsenic 1.80 % As

Sulfur 25.03 % S

______

100.00 %

Empirical Formula:

Cu₁₂Te₃Sb_0.6As_0.4S₁₃

Environment:

Occures in epithermal precious metal veins.

IMA Status:

Valid Species (Pre-IMA) 1909

Locality:

Mohawk mine, Goldfield, Esmeralda County., Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Goldfieldite + Pronunciation

Synonym:

ICSD 83000

PDF 29-531

Goldfieldite Image

Images:

Goldfieldite

Comments: Back granular goldfieldite in white quartz.
Location: Mohawk Mine, Goldfield, Esmeralda County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Goldfieldite Crystallography

Cell Dimensions:

a = 10.304, Z = 2; V = 1,094.00 Den(Calc)= 5.05

Crystal System:

Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: I 43m

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

By Intensity(I/I_o): 2.97(1), 1.82(0.6), 1.55(0.3),3.64(0.3), 2.43(0.2), 2.58(0.2), 2.77(0.1),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Pohl D , Liessmann W , Okrugin V M , Neues Jahrbuch fur Mineralogie, Monatshefte , 1996 (1996) p.1-8, Rietveld analysis of selenium-bearing goldfieldites, Locality: Ozernoya deposit, Kamchatka, Russia

Physical Properties of Goldfieldite

Cleavage:

None

Color:

Dark lead gray, Iron black.

Density:

4.95

Diaphaneity:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

3-3.5 - Calcite-Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

black

Optical Properties of Goldfieldite

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Goldfieldite in Air**
λ	R	∑ R(λ)
400 nm	31.10
420 nm	30.80
440 nm	30.50
460 nm	30.50
480 nm	30.20
500 nm	30.10
520 nm	30.10
540 nm	30.10
560 nm	30.20
580 nm	30.20
600 nm	30.30
620 nm	30.50
640 nm	30.80
660 nm	30.90
680 nm	31.00
700 nm	31.10

**Calculated Relative Intensity Colors of Goldfieldite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%	290%
R

Calculated Properties of Goldfieldite

Electron Density:

Bulk Density (Electron Density)=4.58 gm/cc
note: Specific Gravity of Goldfieldite =5.05 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Goldfieldite= 115.82 barns/electron
U=PE_Goldfieldite x rElectron Density= 530.92 barns/cc.

Radioactivity:

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

Goldfieldite Classification

Dana Class:

03.03.06.06 (03)Sulfides - Sulfosalts

(03.03)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.03.06)Tetrahedrite Group (Isometric: I-43m)

03.03.06.01 Tetrahedrite (Cu,Fe)12Sb4S13 I 43m 4 3m

03.03.06.02 Tennantite (Cu,Fe)12As4S13 I 43m 4 3m

03.03.06.03 Freibergite (Ag,Cu,Fe)12(Sb,As)4S13 I 43m 4 3m

03.03.06.04 Hakite (Cu,Hg)3(Sb,As)(Se,S)3 I 43m 4 3m

03.03.06.05 Giraudite (Cu,Zn,Ag)12(As,Sb)4(Se,S)13 I 43m 4 3m

03.03.06.06 Goldfieldite Cu12(Te,Sb,As)4S13 I 43m 4 3m

03.03.06.07 Argentotennantite (Ag,Cu)10(Zn,Fe)2(As,Sb)4S13 I 43m 4 3m

Strunz Class:

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

02.G - Sulfarsenites, sulfantimonites, sulfbismuthites

02.GB -Neso-sulfarsenites, etc

02.GB.05 Argentotennantite (Ag,Cu)10(Zn,Fe)2(As,Sb)4S13 I 43m 4 3m

02.GB.05 Giraudite (Cu,Zn,Ag)12(As,Sb)4(Se,S)13 I 43m 4 3m

02.GB.05 Goldfieldite Cu12(Te,Sb,As)4S13 I 43m 4 3m

02.GB.05 Freibergite (Ag,Cu,Fe)12(Sb,As)4S13 I 43m 4 3m

02.GB.05 Hakite (Cu,Hg)3(Sb,As)(Se,S)3 I 43m 4 3m

02.GB.05 Tennantite (Cu,Fe)12As4S13 I 43m 4 3m

02.GB.05 Tetrahedrite (Cu,Fe)12Sb4S13 I 43m 4 3m

Other Goldfieldite Information

References:

NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Goldfieldite :
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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Print or Cut-and-Paste your Goldfieldite Specimen Label here :

Goldfieldite

Cu12(Te,Sb,As)4S13
Dana No: 03.03.06.06 Strunz No: 02.GB.05
Locality:

Notes: