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Ferroselite

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Formula:
FeSe
 
2
System:OrthorhombicColour:Steel gray to tin white ...
Lustre:MetallicHardness:6 - 6½
Member of:Marcasite Group
Name:For the chemical composition.
Dimorph of:Dzharkenite

Classification of Ferroselite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/D.20-20
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:2.12.2.2

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
Hey's CIM Ref.:3.9.9

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 Ferroselite

Type Locality:Ust' Uyok deposit (Ust'-Uyuk), Turan District, Tuva Republic, Eastern-Siberian Region, Russia
Year of Discovery:1955

Occurrences of Ferroselite

Geological Setting:Red bed deposits of Colorado Plateau type.

Physical Properties of Ferroselite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Steel gray to tin white with rose tint, brass yellow
Comment:Tarnishes to brassy tone
Streak:Black
Hardness (Mohs):6 - 6½
Hardness (Vickers):VHN25=858 - 933 kg/mm2
Tenacity:Very brittle
Density (measured):7.20 g/cm3
Density (calculated):7.139 g/cm3

Crystallography of Ferroselite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnnm {P21/n 21/n 2/m}
Space Group Setting:Pnnm
Cell Parameters:a = 4.8007Å, b = 5.776Å, c = 3.5850Å
Ratio:a:b:c = 0.831 : 1 : 0.621
Unit Cell Volume:V 99.41 ų (Calculated from Unit Cell)
Z:2
Morphology:Slender prismatic crystals
Twinning:Stellate and cruciform twins, twin lammellae in polished sections.

Optical Data of Ferroselite

Type:Anisotropic
Anisotropism:Strong, from greenish gray to lilac gray
Colour in reflected light:White with gray-brown hue
Pleochroism:Visible

Chemical Properties of Ferroselite

Formula:
FeSe
 
2
Simplified for copy/paste:FeSe2
Essential elements:Fe, Se
All elements listed in formula:Fe, Se
Common Impurities:Co

Relationship of Ferroselite to other Species

Member of:Marcasite Group
Other Members of Group:

- +
Marcasite
FeS
 
2
Common Associates:
UraniniteSeleniumSeleniumPyriteMarcasite
LaumontiteCobaltomeniteClausthaliteChalcopyriteBornite
Baryte
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.10aFrohbergite
FeTe
 
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
(Pt,Rh,Ru)AsS
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
3.9.10Frohbergite
FeTe
 
2
3.9.11Löllingite
FeAs
 
2
3.9.12Arsenopyrite
FeAsS
3.9.13Gudmundite
FeSbS

Other Names for Ferroselite

Synonyms:
Hastite
Other Languages:
German:Ferroselit
Russian:Ферроселит
Simplified Chinese:白硒铁矿
斜方硒铁矿
斜方铁硒矿
Spanish:Ferroselita
Traditional Chinese:白硒鐵礦
斜方硒鐵礦
斜方鐵硒礦

Other Information

Other Information:On heating becomes magnetic
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 Ferroselite

Reference List:

- +
American Mineralogist: 41: 671.

Franz, E. D. (1972): X-ray diffraction data on mixed phases in the pyrite (FeS2)-ferroselite (FeSe2)/pyrrhotite (FeS)-achavalite (FeSe) system. Neues Jahrbuch für Mineralogie, Monatshefte 1972, 276-280.

Internet Links for Ferroselite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Ferroselite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Ferroselite

    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.
    Argentina
     
    • La Rioja
      • Famatina
        • Puerto Alegre
    Paar, et al. (1996): Revista de la Asociacion Geologica Argentina 51 (4):304-312
      • Sierra de Cacho
    Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina); de Brodtkorb, M. K., & Crosta, S. (2010). Reseña de la ubicación geográfica de los seleniuros de la Sierra de Umango, provincia de La Rioja. Revista de la Asociación Geológica Argentina, 67(2), 272-279.
    No reference listed
      • Vinchina Department
    Recursos Minerales de la Republica Argentina, E. O. Zappettini Ed., Buenos Aires 1999 ISSN 0328-2325
    China
     
    • Gansu Province
      • Gannan Autonomous Prefecture
        • Luqu Co.
    Wen Hanjie and Qiu Yuzhou (2001): Presentation at the 11th Annual V.M. Goldschmidt Conference, Abstract no. 3506.
    • Guizhou Province
      • Guiyang Prefecture
        • Kaiyang Co.
    Chen Luming, Zhang Qifa, Li Deren, and Wang Guanxin (1993): Acta Mineralogica Sinica 13(1), 7-11.
    • Inner Mongolia Autonomous Region
      • Alxa League (Alashan Prefecture)
        • Alxa Right Banner (Alashan Youqi)
    Jiayong Pan, Chengdong Liu, Guolin Guo, Anping Chen, Fazheng Chen, Zhaobin Yan, Yiping Chen, and Rengui Wu (2009): Acta Mineralogica Sinica 29(1), 44-48
    Shenyun Wu, Deshang Wang, and Zhanwen Ma (1982): Acta Petrologica Mineralogica et Analytica 1(4), 25-30
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990; Econ Geol (1997) 92:468-484
      • Plzeň Region
        • Planá u Mariánských Lázní (Plan)
    Scharmová, M.: Nové nálezy selenidů a telluridů na uranových ložiskách Zadní Chodov a Vítkov II. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1998, roč. 6, s. 212-216.
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Nové Město na Moravě
    Kvaček, M.: Selenides from the deposits of Western Moravia, Czechoslovakia – Part II. Acta Universitatis Carolinae – Geologica, 1979, vol. 23, nos. 1-2, s. 15-38. ; Econ Geol (1997) 92:468-484
    Kvaček, M.: Selenides from the deposits of Western Moravia, Czechoslovakia – Part II. Acta Universitatis Carolinae – Geologica, 1979, vol. 23, nos. 1-2, s. 15-38.
        • Rožná deposit
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Finland
     
    • Northern Finland Region
    Econ Geol (1997) 92:468-484; Vuorelainen Y, Huhma A, Häkli A (1964): Sederholmite, wilkmanite, kullerudite, mäkinenite, and trüstedtite, five new nickel selenide minerals. Comptes Rendus de la Société Géologique de Finlande. 36, 113-125
    vuorelainen, Y. & al. 1964. Sederholmite, wilkmanite, kullerudite, mäkinenite and trüstedtite, five new nickel-selenide minerals. C. R.Soc. Finlande, Vol. 63, p. 113-125.; Vuorelainen, Y. &al. 1964. Sederholmite, wilkmanite, kullerudite, mäkinenite and trüstedtite, five new nickel-selenide minerals. C. R. Soc. Géol. Finlande, Vol 63, p.113-125.
    Germany
     
    • Bavaria
      • Upper Palatinate
        • Schwandorf
          • Wölsendorf Fluorite mining District
    Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Lower Saxony
      • Harz
        • Lautenthal
    pers. comm. Frank Keutsch (ID: SEM/EDS refl. light)
        • St Andreasberg District
          • St Andreasberg
    Wittern: "Mineralfundorte in Deutschland", 2001
    • Saxony
      • Erzgebirge
        • Schlema-Hartenstein District
          • Alberoda
            • Shaft 366
    The Canadian Mineralogist, V 42, 2004, pp. 1719-1732.
      • Oberlausitz
        • Niesky
          • Horscha
    Witzke, T. & Giesler, T. (2007): Der Schieferabbau Pansberg bei Horscha in der Lausitz, Sachsen. Lapis 32 (7-8), 68-73; 86.
    Kazakhstan
     
    • Almaty Province (Almaty Oblysy; Almati Oblast')
      • Middle Ili River
        • Dzharkenskaya Depression
    Pavel M. Kartashov data
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Yeniseisk Autonomous Oblast'
    Wanlie Ding (2005): World Nuclear Geoscience 22(2), 82-86
      • Tuva Republic
        • Turan District
    DAN-SSSR,(1955) 105, 812-813; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Sweden
     
    • Östergötland
      • Valdemarsvik
    Sandström, F. (2007): Skrikerum. Litiofilen 24 (1), 22-38
    USA
     
    • Colorado
      • Dolores Co.
    Minerals of Colorado (1997) Eckels, E. B.
      • Montrose Co.
    Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
          • Paradox Valley
    Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.; Am Min 53:2075-2077; Geochimica et Cosmochimica Acta Volume 16, Issue 4, July 1959, Pages 296-301
    Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
      • San Miguel Co.
        • Uravan District
    Shawe, D.R., (2011), Uranium-vanadium deposits of the Slick Rock district, Colorado: U.S. Geological Survey Professional Paper 576-F, 80 p., 20 plates.
    • New Mexico
      • McKinley Co.
    Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
    Northrop, Minerals of New Mexico, 3rd rev. ed, 1996
    Austin, S.R., 1983, An investigation of sedimentary, mineralogical, chemical and color patterns and associations in the Rio de Oro mine, McKinley County, New Mexico: U.S. Department of Energy Report GJBX-30(83), 47 p.
    NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
    Minerals of New Mexico 3rd ed.; Am Min 53:2075-2077
    NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
    USGS Prof Paper 550C ppC133-C137
    Econ Geol (1997) 92:468-484
    NMBMMR Memoir 38 Geology and Technology of the Grants Uranium Region 1979
    • Utah
      • Emery Co.
        • San Rafael District (San Rafael Swell)
    UGMS Bull 117 Minerals and Mineral Localities of Utah
    Geochimica et Cosmochimica Acta Volume 16, Issue 4, July 1959, Pages 296-301
      • Grand Co.
        • Thompsons District (S. E. Thomsons)
          • Parco Mine Group
        • Yellow Cat District (W. part of Thompsons District)
          • Cisco
    SEM-EDS and PXRD analyzed by Tony Kampf.
    Collected by and in the collection of Brent Thorne.; Kasatkin, A.V., Plášil, J., Marty, J., Belakovskiy, D.I., Lykova, I.S. (2014): Nestolaite, CaSeO3·H2O, a new mineral from the Little Eva mine, Grand County, Utah, USA. Mineralogical Magazine, 78, 497-505.
    Van King
      • San Juan Co.
        • Blanding
    G. W. Robinson, V. King (1993) Whats New in Minerals. Mineralogical Record 24:381-395
    • Wyoming
      • Carbon Co.
    Harshman, E. N. (1972) Geology and uranium deposits, Shirley Basin area, Wyoming. USGS Prof Paper 745
    Harshman, E. N. (1972) Geology and uranium deposits, Shirley Basin area, Wyoming. USGS Prof Paper 745; USGS Prof Paper 550C ppC133-C137
      • Converse Co.
        • Southern Powder River Basin District
    USGS Prof Paper 550C ppC133-C137
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