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Frohbergite

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Formula:
FeTe
 
2
System:OrthorhombicHardness:3 - 4
Member of:Marcasite Group
Name:For Dr. Max Hans Frohberg, mining geologist, Toronto, Canada.

Classification of Frohbergite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/D.20-50
Nickel-Strunz 10th (pending) edition ID:2.EB.10a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
Dana 8th edition ID:2.12.2.3

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
Hey's CIM Ref.:3.9.10

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
9 : Sulphides etc. of Fe
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Type Occurrence of Frohbergite

Type Locality:Robb-Montbray Mine, Rouyn-Noranda TE, Abitibi-Témiscamingue, Québec, Canada
Year of Discovery:1946

Occurrences of Frohbergite

Geological Setting:Hydrothermal deposits rimming chalcopyrite or as inclusions in gold, petzite, chalcopyrite

Physical Properties of Frohbergite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Hardness (Mohs):3 - 4
Hardness (Vickers):VHN100=250 - 297
Density (calculated):8.057 g/cm3

Crystallography of Frohbergite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnnm
Space Group Setting:Pnnm
Cell Parameters:a = 5.29Å, b = 6.27Å, c = 3.86Å
Ratio:a:b:c = 0.844 : 1 : 0.616
Unit Cell Volume:V 128.03 ų (Calculated from Unit Cell)
Z:2
Morphology:tiny equant grains

Optical Data of Frohbergite

Type:Anisotropic
Anisotropism:Strong, orange red to inky blue
Colour in reflected light:White with bluish or pinkish tint
Pleochroism:Weak

Chemical Properties of Frohbergite

Formula:
FeTe
 
2
Simplified for copy/paste:FeTe2
Essential elements:Fe, Te
All elements listed in formula:Fe, Te

Relationship of Frohbergite to other Species

Series:Forms a series with Mattagamite (see here)
Member of:Marcasite Group
Other Members of Group:

- +
Related Minerals - Nickel-Strunz Grouping):

- +
2.EB.05aAurostibite
AuSb
 
2
2.EB.05bBambollaite
Cu(Se,Te)
 
2
2.EB.05aCattierite
CoS
 
2
2.EB.05aErlichmanite
OsS
 
2
2.EB.05aFukuchilite
Cu
 
3
FeS
 
8
2.EB.05aGeversite
PtSb
 
2
2.EB.05aHauerite
MnS
 
2
2.EB.05aInsizwaite
Pt(Bi,Sb)
 
2
2.EB.05aKrut'aite
CuSe
 
2
2.EB.05aLaurite
RuS
 
2
2.EB.05aPenroseite
(Ni,Co,Cu)Se
 
2
2.EB.05aPyrite
FeS
 
2
2.EB.05aSperrylite
PtAs
 
2
2.EB.05aTrogtalite
CoSe
 
2
2.EB.05aVaesite
NiS
 
2
2.EB.05aVillamaninite
(Cu,Ni,Co,Fe)S
 
2
2.EB.05aDzharkenite
FeSe
 
2
2.EB.05aGaotaiite
Ir
 
3
Te
 
8
2.EB.10bAlloclasite
Co
 
1-x
Fe
 
x
AsS
2.EB.10dCostibite
CoSbS
2.EB.10aFerroselite
FeSe
 
2
2.EB.10cGlaucodot
(Co
 
0.50
Fe
 
0.50
)AsS
2.EB.10aKullerudite
NiSe
 
2
2.EB.10aMarcasite
FeS
 
2
2.EB.10aMattagamite
CoTe
 
2
2.EB.10eParacostibite
CoSbS
2.EB.10ePararammelsbergite
NiAs
 
2
2.EB.10fOenite
CoSbAs
2.EB.15aAnduoite
(Ru,Os)As
 
2
2.EB.15aClinosafflorite
CoAs
 
2
2.EB.15aLöllingite
FeAs
 
2
2.EB.15aNisbite
NiSb
 
2
2.EB.15aOmeiite
(Os,Ru)As
 
2
2.EB.15cPaxite
CuAs
 
2
2.EB.15aRammelsbergite
NiAs
 
2
2.EB.15aSafflorite
CoAs
 
2
2.EB.15bSeinäjokite
(Fe,Ni)(Sb,As)
 
2
2.EB.20Arsenopyrite
FeAsS
2.EB.20Gudmundite
FeSbS
2.EB.20Osarsite
(Os,Ru)AsS
2.EB.20Ruarsite
(Ru,Os)AsS
2.EB.25Cobaltite
CoAsS
2.EB.25Gersdorffite
NiAsS
2.EB.25Hollingworthite
(Rh,Pt,Pd)AsS
2.EB.25Irarsite
(Ir,Ru,Rh,Pt)AsS
2.EB.25Jolliffeite
NiAsSe
2.EB.25Krutovite
NiAs
 
2
2.EB.25Maslovite
PtBiTe
2.EB.25Michenerite
PdBiTe
2.EB.25Padmaite
PdBiSe
2.EB.25Platarsite
PtAsS
2.EB.25Testibiopalladite
PdTe(Sb,Te)
2.EB.25Tolovkite
IrSbS
2.EB.25Ullmannite
NiSbS
2.EB.25Willyamite
(Co,Ni)SbS
2.EB.25Changchengite
IrBiS
2.EB.25Mayingite
IrBiTe
2.EB.25Hollingsworthite
2.EB.25Kalungaite
PdAsSe
2.EB.25Milotaite
PdSbSe
2.EB.30Urvantsevite
Pd(Bi,Pb)
 
2
2.EB.35Rheniite
ReS
 
2
Related Minerals - Hey's Index Grouping:

- +
3.9.1Pyrrhotite
Fe
 
1-x
S (x = 0 to 0.17)
3.9.3Pyrite
FeS
 
2
3.9.4Marcasite
FeS
 
2
3.9.5Greigite
Fe
2+
 
Fe
3+
2
S
 
4
3.9.6Mackinawite
(Fe,Ni)
 
9
S
 
8
3.9.7Smythite
(Fe,Ni)
 
3+x
S
 
4
(x=0-0.3)
3.9.8Achavalite
(Fe,Cu)Se
3.9.9Ferroselite
FeSe
 
2
3.9.11Löllingite
FeAs
 
2
3.9.12Arsenopyrite
FeAsS
3.9.13Gudmundite
FeSbS

Other Names for Frohbergite

Other Languages:
German:Frohbergit
Russian:Фробергит
Simplified Chinese:碲铁矿
Spanish:Frohbergita
Varieties:
Cobalt-frohbergite

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Frohbergite

Reference List:

- +
THOMPSON, R.M. (1947): Frohbergite, FeTe2, a new member of the marcasite group. Contributions to Canadian Mineralogy, University of Toronto Studies, Geological Series 51, 35-40. Abstracted in American Mineralogist 32, 210.
THOMPSON, R.M. (1949): The telluride minerals and their occurrence in Canada. American Mineralogist 34, 342-382.
RUCKLIDGE, J. (1969): Frohbergite, montbrayite and a new PbBBi telluride. Canadian Mineralogist 9, 709-716.
BROSTIGEN, G. & KJEKSHUS, A. (1970): Compounds with marcasite type crystal structure. V. The crystal structures of FeS2, FeTe2, and CoTe2. Acta Chemica Scandinavica 24, 1925-1940.

Internet Links for Frohbergite

Search Engines:
  • Look for Frohbergite on Google
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  • External Links:
  • Look for Frohbergite on Webmineral
  • Look for Frohbergite on Athena Mineralogy
  • Look for Frohbergite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Frohbergite details from Handbook of Mineralogy (PDF)
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  • Localities for Frohbergite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Brazil
     
    • Goiás
      • Mara Rosa district
        • Mara Rosa
    Econ Geol. (1995) 90:308-321; de Oliveira, C. G., de Queiroz, C. L., & Pimentel, M. M. (2008). The arenopólis-mara rosa Gold-Copper Belt, Neoproterozoic Goiás Magmatic Arc. Brazilian Journal of Geology, 30(2), 219-221.; Kuyumjian, R. M. (2008). Magmatic arc and associated gold, copper, silver, and barite deposits in the state of Goiás, central Brazil: characteristics and speculations. Brazilian Journal of Geology, 30(2).
    Canada
     
    • British Columbia
      • Omenica Mining Division
        • Lindquist Lake
    Handbook of Mineralogy
    • Québec
      • Abitibi-Témiscamingue
        • La Vallée-de-l'Or RCM
          • Val d'Or
    Econ.Geol.: 83; 395-404
        • Rouyn-Noranda TE
    Econ.Geol.: 83; 395-404
    THOMPSON, R.M. (1947): Frohbergite, FeTe2, a new member of the marcasite group. Contributions to Canadian Mineralogy, University of Toronto Studies, Geological Series 51, 35-40. Abstracted in American Mineralogist 32, 210. THOMPSON, R.M. (1949): The telluride minerals and their occurrence in Canada. American Mineralogist 34, 342-382. RUCKLIDGE, J. (1969): Frohbergite, montbrayite and a new Pb-Bi telluride. Canadian Mineralogist 9, 709-716.
    China
     
    • Shandong Province
      • Linyi Prefecture
        • Pingyi Co.
          • Tongshi complex
    Xuefeng Yu (2001): Shandong Geology 17(3-4), 59-64
    Finland
     
    • Eastern Finland Region
    Hytönen,K. (1999): Suomen Mineraalit. Geologian tutkimuskeskus. Erillisjulkaisu, Jyväskylä, 399 pp (p.346)
    Kojonen, Kari, Johanson, Bo, Pakkanen, Lassi and O´Brien, Hugh 1991. Ilomantsin Korvilansuo Au-malmiaiheen mineralogiaa ja petrografiaa, 40 s. Geologian Tutkimuskeskus arkistoraportti M19/4244/-91/1/42.
    Geological Survey of Finland 2008. Pampalo(Ward)-Gold Database.
    • Northern Finland Region
      • Kuusamo
    Geological Survey of Finland 2008. Hangaslampi - Gold Database
    Eilu, P. (2003). Exploration for orogenic gold deposits. Fennoscandian Exploration and Mining 2003. Rovaniemi, Finland ; Geological Survey of Finland 2007 Juomasuo - Gold Database
    • Western and Inner Finland Region
      • Orivesi
    Economic Geology (1996) 91:1335-1353; Eilu, P. (2003). Exploration for orogenic gold deposits. Fennoscandian Exploration and Mining 2003. Rovaniemi, Finland
    France
     
    • Brittany
      • Finistère
        • Bolazec
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Japan
     
    • Hokkaido
      • Sapporo
    Nakata et al (1989) Mineralogical Magazine, 53, 387-388.
    • Honshu Island
      • Chubu Region
        • Shizuoka Prefecture
          • Shimoda City
            • Rendaiji
    Gunnar Farber and Luigi Chiappino specimens, 2007 (but one of these, analyzed by F. Keutsch, showed only gold and gold tellurides).
    Kazakhstan
     
    • Akmola Province (Aqmola Oblysy; Akmolinskaya Oblast')
    P.M. Kartashov analytical data
    Norway
     
    • Finnmark
      • Kautokeino
    Neumann, H. (1985): Norges Mineraler. Norges Geologiske Undersøkelse Skrifter 68. (p. 39).
    Romania
     
    • Alba Co.
      • Zlatna (Zalatna; Zalathna)
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    • Hunedoara Co.
      • Brad
    Econ.Geol.: 83; 395-404; Singer, D.A., Berger, V.I., and Moring, B.C. (2008): US Geological Survey Open-File Report 2008-1155.
      • Deva
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Econ.Geol.: 83; 395-404
    M. Lupulescu (1996) Tellurantimony and frohbergite from Stanija ore deposit (Apuseni Mtns.): a discussion. Anal.Univ.Buc., Geol., XLV, p. 3-9.
    Saudi Arabia
     
    • Mintaqah Al Madinah
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Econ.Geol.: 83; 395-404
    • Mintaqah Tabuk
      • Wejh
    Econ.Geol.: 83; 395-404
    Sweden
     
    • Hälsingland
      • Ljusdal
    Nysten, P. & Annersten, H. (1984): The gold mineralization at Enåsen, central Sweden. Geologiska Foereningens i Stockholm Foerhandlingar 106, 245-256.
    • Västerbotten
      • Sandfors
    No reference listed
    T. Wikström, thesis from Stockholm University
    Ukraine
     
    • Kiev Oblast' (Kyiv Oblast'; Kyivshchyna)
    Bondarenko, S.; Grinchenko, O.; Semka, V. (2005): Au-Ag-Te-Se mineralization in the Potashnya gold deposit, Kocherov tectonic zone, Ukrainian Shield. Geokhimiya, Mineralogiya i Petrologiya 43, 20-25.
    USA
     
    • Arizona
      • Cochise Co.
        • Bowie area
          • San Simon Basin (San Simon River; Bowie Chabazite deposit)
    Handbook of Mineralogy, http://rruff.geo.arizona.edu/doclib/hom/frohbergite.pdf>
        • Tombstone Hills
          • Tombstone District
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 227; Williams, S.A. (1980b), The Tombstone District, Cochise Co., AZ, Min.Rec.: 11: 251-256.
    • Colorado
      • Gunnison Co.
        • Vulcan District (Cebolla District; Domingo District)
          • Vulcan
    Frank Keutsch collection, polished section SEM/EDS and reflected light
      • Montgomery Co.
        • Carolina Slate Belt
    Callahan,J.E,Craig,J.R Solberg,T.N,1995, Telluride mineralization of the southeastern United States,Southeastern Geology,v.35, no.3, pg.139-151
    Uzbekistan
     
    • Tashkent Viloyati (Toshkent)
      • Angren Region
        • Chatkal-Kuraminskii Range
    Kovalenker, V. et al New Data on Minerals (2003): 38: 45-56
    Pasi Eilu (2003) Exploration for orogenic gold deposits. Fennoscandian Exploration and Mining 2003 Rovaniemi, Finland December 2003
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