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Löllingite

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Formula:
FeAs2
System:
Orthorhombic
Colour:
Steel gray to silver ...
Lustre:
Metallic
Hardness:
5 - 5½
Name:
Named in 1845 by Wilhelm Karl von Haidinger for the type locality at Wolfbau Mine, Lölling District, Hüttenberger Erzberg, Hüttenberg, Friesach - Hüttenberg area, Carinthia, Austria.
Löllingite Group.

Forms a series with safflorite and can also contain considerable amounts of nickel (solid solution with rammelsbergite).

Classification of Löllingite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
2.EB.15a

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.
2.12.2.9

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
3.9.11

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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First Recorded Occurrence of Löllingite

Physical Properties of Löllingite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Steel gray to silver white
Streak:
Greyish black
Hardness (Mohs):
5 - 5½
Hardness (Vickers):
VHN100=859 - 920 kg/mm2
Cleavage:
Distinct/Good
Distinct on {010}{101}
Density:
7.43 g/cm3 (Measured)    7.472 g/cm3 (Calculated)

Crystallography of Löllingite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnnm
Cell Parameters:
a = 5.16Å, b = 5.93Å, c = 3.05Å
Ratio:
a:b:c = 0.87 : 1 : 0.514
Unit Cell Volume:
V 93.33 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Prismatic
Twinning:
On {001}, possibly trillings, polysynthetic on {101}

Crystallographic forms of Löllingite

Crystal Atlas:
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Löllingite - {110}, {101}, {011}, modified
Löllingite - Prismatic {110}
Löllingite - Prismatic {011}
3d models and HTML5 code kindly provided by www.smorf.nl.

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X-Ray Powder Diffraction Data:
d-spacingIntensity
2.605 (100)
2.599 (60)
2.532 (60)
2.421 (30)
2.331 (65)
1.854 (30)
1.634 (35)

Optical Data of Löllingite

Type:
Anisotropic
Anisotropism:
Strong

Chemical Properties of Löllingite

Formula:
FeAs2
Essential elements:
All elements listed in formula:
Common Impurities:
Bi

Relationship of Löllingite to other Species

Other Members of Group:
2.EB.05aAurostibiteAuSb2
2.EB.05bBambollaiteCu(Se,Te)2
2.EB.05aCattieriteCoS2
2.EB.05aErlichmaniteOsS2
2.EB.05aFukuchiliteCu3FeS8
2.EB.05aGeversitePtSb2
2.EB.05aHaueriteMnS2
2.EB.05aInsizwaitePt(Bi,Sb)2
2.EB.05aKrut'aiteCuSe2
2.EB.05aLauriteRuS2
2.EB.05aPenroseite(Ni,Co,Cu)Se2
2.EB.05aPyriteFeS2
2.EB.05aSperrylitePtAs2
2.EB.05aTrogtaliteCoSe2
2.EB.05aVaesiteNiS2
2.EB.05aVillamaninite(Cu,Ni,Co,Fe)S2
2.EB.05aDzharkeniteFeSe2
2.EB.05aGaotaiiteIr3Te8
2.EB.10bAlloclasiteCo1-xFexAsS
2.EB.10dCostibiteCoSbS
2.EB.10aFerroseliteFeSe2
2.EB.10aFrohbergiteFeTe2
2.EB.10cGlaucodot(Co0.50Fe0.50)AsS
2.EB.10aKulleruditeNiSe2
2.EB.10aMarcasiteFeS2
2.EB.10aMattagamiteCoTe2
2.EB.10eParacostibiteCoSbS
2.EB.10ePararammelsbergiteNiAs2
2.EB.10fOeniteCoSbAs
2.EB.15aAnduoite(Ru,Os)As2
2.EB.15aClinosaffloriteCoAs2
2.EB.15aNisbiteNiSb2
2.EB.15aOmeiite(Os,Ru)As2
2.EB.15cPaxiteCuAs2
2.EB.15aRammelsbergiteNiAs2
2.EB.15aSafflorite(Co,Ni,Fe)As2
2.EB.15bSeinäjokite(Fe,Ni)(Sb,As)2
2.EB.20ArsenopyriteFeAsS
2.EB.20GudmunditeFeSbS
2.EB.20Osarsite(Os,Ru)AsS
2.EB.20Ruarsite(Ru,Os)AsS
2.EB.25CobaltiteCoAsS
2.EB.25GersdorffiteNiAsS
2.EB.25Hollingworthite(Rh,Pt,Pd)AsS
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsS
2.EB.25JolliffeiteNiAsSe
2.EB.25KrutoviteNiAs2
2.EB.25MaslovitePtBiTe
2.EB.25MicheneritePdBiTe
2.EB.25PadmaitePdBiSe
2.EB.25PlatarsitePtAsS
2.EB.25TestibiopalladitePdTe(Sb,Te)
2.EB.25TolovkiteIrSbS
2.EB.25UllmanniteNiSbS
2.EB.25Willyamite(Co,Ni)SbS
2.EB.25ChangchengiteIrBiS
2.EB.25MayingiteIrBiTe
2.EB.25Hollingsworthite
2.EB.25KalungaitePdAsSe
2.EB.25MilotaitePdSbSe
2.EB.30UrvantsevitePd(Bi,Pb)2
2.EB.35RheniiteReS2
3.9.1PyrrhotiteFe1-xS (x = 0 to 0.17)
3.9.3PyriteFeS2
3.9.4MarcasiteFeS2
3.9.5GreigiteFe2+Fe23+S4
3.9.6Mackinawite(Fe,Ni)9S8
3.9.7Smythite(Fe,Ni)3+xS4 (x=0-0.3)
3.9.8Achavalite(Fe,Cu)Se
3.9.9FerroseliteFeSe2
3.9.10FrohbergiteFeTe2
3.9.12ArsenopyriteFeAsS
3.9.13GudmunditeFeSbS

Other Names for Löllingite

Other Information

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

References for Löllingite

Reference List:
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 303-307.

American Mineralogist (1968): 53: 1856.

Kjekshus, A., Rakke, T., Andresen, A. (1974): Compounds of the marcasite type crystal structure. IX. Structural data for FeAs2, FeSe2, NiAs2, NiSb2, and CuSe2. Acta Chemica Scandinavica, A28, 996-1000.

Kjekshus, A., Peterzéns, P. G., Rakke, T., Andresen, A. F. (1979): Compounds with the marcasite type crystal structure. XIII. Structural and magnetic properties of CrtFe1-tAs2, CrtFe1-tSb2, Fe1-tNitAs2 and Fe1-t NitSb2. Acta Chemica Scandinavica, A33, 469-480.

Zeitschrift für Kristallographie: 32: 165-187.

Ondruš, P., Vavrín, I., Skála, R., Veselovský, F. (2001): Low-temperature Ni-rich löllingite from Háje, Príbram, Czech Republic. Rietveld crystal structure refinement. Neues Jahrbuch für Mineralogie, Monatshefte, 2001, 169-185.

Hem, S. R., Makovicky, E., Gervilla, F. (2001): Compositional trends in Fe, Co, and Ni sulfarsenides and their crystal-chemical implications: results from the Arroyo de la Cueva deposits, Ronda peridotite, southern Spain. Canadian Mineralogist, 39, 831-853.

Nesbitt, H.W., Uhlig, I., and Szargan, R. (2002) Surface reconstruction and As-polymerization at fractured loellingite (FeAs2) surfaces. American Mineralogist: 87: 1000-1004.

Gritzenko, Y. D., Spiridonov, E. M. (2005): Minerals of continuous series rammelsbergite—loellingite and rammelsbergite—safflorite in metamorphic—hydrothermal veins of Norilsk ore field. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva, 134 (1), 53-68.

Internet Links for Löllingite

Specimens:
The following Löllingite specimens are currently listed for sale on minfind.com.

Localities for Löllingite

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.
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