|
![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Furutobeite Mineral Data
|
|
|
General Furutobeite Information
|
Chemical Formula: |
(Cu,Ag)6PbS4 |
Composition: |
Molecular Weight = 761.06 gm |
|
Copper 41.75 % Cu |
|
Silver 14.17 % Ag |
|
Lead 27.23 % Pb |
|
Sulfur 16.85 % S |
|
______ |
|
100.00 % |
Empirical Formula: |
Cu5AgPbS4 |
Environment: |
In veinlets of stromeyerite that cut bornite in the Kuroko zone of a stratbound, Kuroko-type, massive sufide deposit. |
IMA Status: |
Approved IMA 1978 |
Locality: |
Furutobe mine, Akita Prefecture, Japan. Link to MinDat.org Location Data. |
Name Origin: |
Named for the locality. |
Name Pronunciation: |
Furutobeite + Pronunciation |
|
Furutobeite Image |
Images:
|
|
Furutobeite
Comments: Black, prismatic furutobeite crystals.
Location: Tsumeb, Namibia.
Scale: See Image.
© William Pinch |
|
Furutobeite Crystallography
|
Axial Ratios: |
a:b:c =5.0529:1:2.4489 |
Cell Dimensions: |
a = 20.025, b = 3.963, c = 9.705, Z = 4; beta = 101.57° V = 754.53 Den(Calc)= 6.70 |
Crystal System: |
Monoclinic - Domatic H-M Symbol (m) Space Group: Cm ? |
X Ray Diffraction: |
By Intensity(I/Io): 2.5(1), 2.95(0.9), 2.55(0.7), |
|
Physical Properties of Furutobeite
|
Color: |
Gray. |
Density: |
6.74 |
Diaphaneity: |
Opaque |
Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
Hardness: |
3 - Calcite |
Luster: |
Metallic |
|
Optical Properties of Furutobeite
|
RL Anisotrophism: |
Moderate, from light yellow to dark brown. |
RL Color: |
Creamy yellow tint. |
RL Pleochroism: |
Weak. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Furutobeite in Air
λ |
R1 |
R2 |
![](../images/Reflect_scale_v.gif) |
∑ R1(λ) |
∑ R2(λ) |
400 nm |
35.70 |
34.20 |
![](../images/400nm.BMP)
![](../images/400nm.BMP) |
|
|
420 nm |
35.20 |
34.30 |
![](../images/420nm.BMP)
![](../images/420nm.BMP) |
440 nm |
35.00 |
34.50 |
![](../images/440nm.BMP)
![](../images/440nm.BMP) |
460 nm |
34.70 |
34.90 |
![](../images/460nm.BMP)
![](../images/460nm.BMP) |
480 nm |
34.50 |
35.30 |
![](../images/480nm.BMP)
![](../images/480nm.BMP) |
500 nm |
34.40 |
35.60 |
![](../images/500nm.BMP)
![](../images/500nm.BMP) |
520 nm |
34.40 |
35.90 |
![](../images/520nm.BMP)
![](../images/520nm.BMP) |
540 nm |
34.60 |
36.20 |
![](../images/540nm.BMP)
![](../images/540nm.BMP) |
560 nm |
34.70 |
36.30 |
![](../images/560nm.BMP)
![](../images/560nm.BMP) |
580 nm |
34.80 |
36.40 |
![](../images/580nm.BMP)
![](../images/580nm.BMP) |
600 nm |
34.90 |
36.40 |
![](../images/600nm.BMP)
![](../images/600nm.BMP) |
620 nm |
34.90 |
36.30 |
![](../images/620nm.BMP)
![](../images/620nm.BMP) |
640 nm |
34.90 |
36.30 |
![](../images/640nm.BMP)
![](../images/640nm.BMP) |
660 nm |
34.80 |
36.20 |
![](../images/660nm.BMP)
![](../images/660nm.BMP) |
680 nm |
34.50 |
36.10 |
![](../images/680nm.BMP)
![](../images/680nm.BMP) |
700 nm |
34.30 |
36.00 |
![](../images/700nm.BMP)
![](../images/700nm.BMP) |
Calculated Relative Intensity Colors of Furutobeite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
260% |
R1 |
|
|
|
|
|
|
|
|
|
|
|
R2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Calculated Properties of Furutobeite
|
Electron Density: |
Bulk Density (Electron Density)=5.95 gm/cc note: Specific Gravity of Furutobeite =6.70 gm/cc. |
Fermion Index: |
Fermion Index = 0.06 Boson Index = 0.94 |
Photoelectric: |
PEFurutobeite = 527.62 barns/electron U=PEFurutobeite x rElectron Density=3,139.95 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Furutobeite is Not Radioactive |
|
Furutobeite Classification
|
Dana Class: |
02.16.12.01 (02)Sulfides - Including Selenides and Tellurides |
|
(02.16)with miscellaneous formulae |
|
(02.16.12)Dana Group |
|
02.16.12.01 Furutobeite (Cu,Ag)6PbS4 Cm ? m |
|
02.16.12.02 Schlemaite! (Cu,[])6(Pb,Bi)Se4 P 21/m 2/m |
Strunz Class: |
02.BE.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
|
02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1) |
|
02.BE -With Pb(Bi) |
|
02.BE.10 Furutobeite (Cu,Ag)6PbS4 Cm ? m |
|
Other Furutobeite Information
|
References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Furutobeite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
Search for Furutobeite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Furutobeite :
Ask about Furutobeite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espaņol
Print or Cut-and-Paste your Furutobeite Specimen Label here :
Furutobeite
(Cu,Ag)6PbS4
Dana No: 02.16.12.01 Strunz No: 02.BE.10
Locality:
Notes:
|
|
|
|
|
|
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.