|
![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Frohbergite Mineral Data
|
|
|
General Frohbergite Information
|
Chemical Formula: |
FeTe2 |
Composition: |
Molecular Weight = 311.05 gm |
|
Iron 17.95 % Fe |
|
Tellurium 82.05 % Te |
|
______ |
|
100.00 % |
Empirical Formula: |
Fe2+Te2 |
Environment: |
In hydrothermal ore deposits, rimming chalcopyrite grains, and as inclusions in gold, petzite, or chalcopyrite. |
IMA Status: |
Valid Species (Pre-IMA) 1947 |
Locality: |
From the Robb-Montbray and Oranda mines, Quebec. Link to MinDat.org Location Data. |
Name Origin: |
For Dr. Max Hans Frohberg, mining geologist, Toronto, Canada. |
Name Pronunciation: |
Frohbergite + Pronunciation |
Synonym: |
ICSD 25679 |
|
PDF 14-419 |
|
Frohbergite Image |
Images:
|
|
Frohbergite Crystallography
|
Axial Ratios: |
a:b:c =0.8434:1:0.615 |
Cell Dimensions: |
a = 5.28, b = 6.26, c = 3.85, Z = 2; V = 127.25 Den(Calc)= 8.12 |
Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
X Ray Diffraction: |
By Intensity(I/Io): 2.81(1), 2.71(0.7), 2.07(0.5), |
|
Physical Properties of Frohbergite
|
Cleavage: |
None |
Color: |
Silver white, Tin white. |
Density: |
8.055 |
Diaphaneity: |
Opaque |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Hardness: |
3-4 - Calcite-Fluorite |
Luster: |
Metallic |
|
Optical Properties of Frohbergite
|
RL Anisotrophism: |
Strong, orange-red to inky blue. |
RL Color: |
White with bluish or pinkish tint. |
RL Pleochroism: |
Extremely weak. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Frohbergite in Air
λ |
R1 |
R2 |
![](../images/Reflect_scale_v.gif) |
∑ R1(λ) |
∑ R2(λ) |
400 nm |
56.70 |
57.10 |
![](../images/400nm.BMP)
![](../images/400nm.BMP) |
|
|
420 nm |
54.80 |
56.20 |
![](../images/420nm.BMP)
![](../images/420nm.BMP) |
440 nm |
52.90 |
55.30 |
![](../images/440nm.BMP)
![](../images/440nm.BMP) |
460 nm |
51.90 |
54.50 |
![](../images/460nm.BMP)
![](../images/460nm.BMP) |
480 nm |
51.10 |
53.80 |
![](../images/480nm.BMP)
![](../images/480nm.BMP) |
500 nm |
50.60 |
53.10 |
![](../images/500nm.BMP)
![](../images/500nm.BMP) |
520 nm |
50.10 |
52.60 |
![](../images/520nm.BMP)
![](../images/520nm.BMP) |
540 nm |
50.00 |
52.40 |
![](../images/540nm.BMP)
![](../images/540nm.BMP) |
560 nm |
50.20 |
52.50 |
![](../images/560nm.BMP)
![](../images/560nm.BMP) |
580 nm |
50.70 |
53.00 |
![](../images/580nm.BMP)
![](../images/580nm.BMP) |
600 nm |
51.40 |
53.80 |
![](../images/600nm.BMP)
![](../images/600nm.BMP) |
620 nm |
52.20 |
54.50 |
![](../images/620nm.BMP)
![](../images/620nm.BMP) |
640 nm |
53.00 |
55.40 |
![](../images/640nm.BMP)
![](../images/640nm.BMP) |
660 nm |
53.90 |
56.30 |
![](../images/660nm.BMP)
![](../images/660nm.BMP) |
680 nm |
55.00 |
57.40 |
![](../images/680nm.BMP)
![](../images/680nm.BMP) |
700 nm |
56.20 |
58.50 |
![](../images/700nm.BMP)
![](../images/700nm.BMP) |
Calculated Relative Intensity Colors of Frohbergite in Air
Relative Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
180% |
R1 |
|
|
|
|
|
|
|
|
|
|
R2 |
|
|
|
|
|
|
|
|
|
|
|
|
Calculated Properties of Frohbergite
|
Electron Density: |
Bulk Density (Electron Density)=6.79 gm/cc note: Specific Gravity of Frohbergite =8.12 gm/cc. |
Fermion Index: |
Fermion Index = 0.06 Boson Index = 0.94 |
Photoelectric: |
PEFrohbergite = 307.26 barns/electron U=PEFrohbergite x rElectron Density=2,085.49 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Frohbergite is Not Radioactive |
|
Frohbergite Classification
|
Dana Class: |
02.12.02.03 (02)Sulfides - Including Selenides and Tellurides |
|
(02.12)where Am Bn Xp, with (m+n):p=1:2 |
|
(02.12.02)Marcasite Group (Orthorhombic: Pnnm) |
|
02.12.02.01 Marcasite FeS2 Pnnm 2/m 2/m 2/m |
|
02.12.02.02 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m |
|
02.12.02.03 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m |
|
02.12.02.04 Hastite? CoSe2 Pnnm 2/m 2/m 2/m |
|
02.12.02.05 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m |
|
02.12.02.06 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m |
|
02.12.02.07 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m |
|
02.12.02.08 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m |
|
02.12.02.09 Lollingite FeAs2 Pnnm 2/m 2/m 2/m |
|
02.12.02.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m |
|
02.12.02.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m |
|
02.12.02.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m |
|
02.12.02.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m |
Strunz Class: |
02.EB.10a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
|
02.E - Metal Sulfides, M:S � 1:2 |
|
02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc. |
|
02.EB.10a Frohbergite FeTe2 Pnnm 2/m 2/m 2/m |
|
02.EB.10a Hastite? CoSe2 Pnnm 2/m 2/m 2/m |
|
02.EB.10a Ferroselite FeSe2 Pnnm 2/m 2/m 2/m |
|
02.EB.10a Kullerudite NiSe2 Pnnm 2/m 2/m 2/m |
|
02.EB.10a Mattagamite CoTe2 Pnnm 2/m 2/m 2/m |
|
02.EB.10a Marcasite FeS2 Pnnm 2/m 2/m 2/m |
|
Other Frohbergite Information
|
References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Frohbergite :
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
Search for Frohbergite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Frohbergite :
Ask about Frohbergite 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
Español
Print or Cut-and-Paste your Frohbergite Specimen Label here :
Frohbergite
FeTe2
Dana No: 02.12.02.03 Strunz No: 02.EB.10a
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.