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Löllingite

Formula:
FeAs
 
2
System:OrthorhombicColour:Steel gray to silver ...
Lustre:MetallicHardness:5 - 5½
Name:For the type locality.


Löllingite Group.

Forms a series with Safflorite and can also contain considerable amounts of nickel.

Classification of Löllingite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/D.23-10
Nickel-Strunz 10th (pending) edition ID:2.EB.15

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:2.12.2.9

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

Type Locality:Wolfbau Mine, Lölling District, Hüttenberger Erzberg, Hüttenberg, Friesach - Hüttenberg area, Carinthia, Austria

Physical Properties of Löllingite

Lustre: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 (measured):7.43 g/cm3
Density (calculated):7.472 g/cm3

Crystallography of Löllingite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnnm (P21/n 21/n 2/m)
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, polysynthrtic on {101}
Crystal Atlas:
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Löllingite - {110}, {101}, {011}, modified
Löllingite - Prismatic {110}
Löllingite - Prismatic {011}

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Optical Data of Löllingite

Type:Anisotropic
Anisotropism:Strong

Chemical Properties of Löllingite

Formula:
FeAs
 
2
Essential elements:As, Fe
All elements listed in formula:As, Fe
Common Impurities:Bi

Relationship of Löllingite to other Species

Related Minerals - Nickel-Strunz Grouping):
2.EB.05Aurostibite
AuSb
 
2
2.EB.05Bambollaite
Cu(Se,Te)
 
2
2.EB.05Cattierite
CoS
 
2
2.EB.05Erlichmanite
OsS
 
2
2.EB.05Fukuchilite
Cu
 
3
FeS
 
8
2.EB.05Geversite
PtSb
 
2
2.EB.05Hauerite
MnS
 
2
2.EB.05Insizwaite
Pt(Bi,Sb)
 
2
2.EB.05Krut'aite
CuSe
 
2
2.EB.05Laurite
RuS
 
2
2.EB.05Penroseite
(Ni,Co,Cu)Se
 
2
2.EB.05Pyrite
FeS
 
2
2.EB.05Sperrylite
PtAs
 
2
2.EB.05Trogtalite
CoSe
 
2
2.EB.05Vaesite
NiS
 
2
2.EB.05Villamanínite
(Cu,Ni,Co,Fe)S
 
2
2.EB.05Dzharkenite
FeSe
 
2
2.EB.05Gaotaiite
Ir
 
3
Te
 
8
2.EB.10Ferroselite
FeSe
 
2
2.EB.10Frohbergite
FeTe
 
2
2.EB.10Hastite
CoSe
 
2
2.EB.10Kullerudite
NiSe
 
2
2.EB.10Marcasite
FeS
 
2
2.EB.10Mattagamite
CoTe
 
2
2.EB.15Alloclasite
(Co
 
0.65
Fe
 
0.35
)AsS - CoAsS
2.EB.15Anduoite
(Ru,Os)As
 
2
2.EB.15Clinosafflorite
(Co,Fe,Ni)As
 
2
2.EB.15Costibite
CoSbS
2.EB.15Krutovite
NiAs
 
2
2.EB.15Nisbite
NiSb
 
2
2.EB.15Omeiite
(Os,Ru)As
 
2
2.EB.15Paracostibite
CoSbS
2.EB.15Pararammelsbergite
NiAs
 
2
2.EB.15Rammelsbergite
NiAs
 
2
2.EB.15Safflorite
(Co,Fe)As
 
2
2.EB.15Seinäjokite
(Fe,Ni)(Sb,As)
 
2
2.EB.15Oenite
CoSbAs
2.EB.20Arsenopyrite
FeAsS - (Fe
 
0.90
Co
 
0.10
)AsS
2.EB.20Glaucodot
(Fe
 
0.65
Co
 
0.35
)AsS - (Co
 
0.65
Fe
 
0.35
)AsS
2.EB.20Gudmundite
FeSbS
2.EB.20Osarsite
(Os,Ru)AsS
2.EB.20Paxite
CuAs
 
2
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.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
 
0.83-1
S
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)
 
9
S
 
11
3.9.8Achavalite
FeSe
3.9.9Ferroselite
FeSe
 
2
3.9.10Frohbergite
FeTe
 
2
3.9.12Arsenopyrite
FeAsS - (Fe
 
0.90
Co
 
0.10
)AsS
3.9.13Gudmundite
FeSbS

Other Names for Löllingite

Synonyms:
ArsenosideriteAsenosideriteHüttenbergiteLeucopuriteLoellingite
MohsinMohsinePharmakopyritePrismatischer ArsenikalkiesSaetersbergite
Sätersbergite
German names:
ArseneisenArsenikeisenArsenosideritAsenosideritAxotomer Arsenikkies
HüttenbergitLeucopuritLoellingitLöllingitPharmakopyrit
SaetersbergitSätersbergit
Russian names:
Леллингит
Spanish names:
ArsenosideritaAsenosideritaHüttenbergitaLeucopuritaLoellingita
LöllingitaSaetersbergitaSätersbergita
Varieties:
GeyeriteGlaucopyrite

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 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.

Zeitschrift für Kristallographie: 32: 165-187.

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

Internet Links for Löllingite

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  • Look for Löllingite on Wikipedia
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Löllingite in the Natural History Museum (London) online catalogue
  • Löllingite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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    Localities for Löllingite

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