Lollingite Mineral Data + Say LOLLINGITE


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General Lollingite Information
Help on Chemical Formula: Chemical Formula: FeAs2
Help on Composition: Composition: Molecular Weight = 205.69 gm
   Iron     27.15 %  Fe
   Arsenic  72.85 %  As
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+As2
Help on Environment: Environment: In mesotherma deposits associated with other sufides and calcite gangue; also found in pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1845
Help on Locality: Locality: Lölling, Hüttenberg, Carinthia, Austria Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Synonym: Synonym: Loellingite
 

Lollingite Image

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Lollingite

Comments: Sharp, twinned crystals L?llingite on matrix.
Location: Oruro, Oruro Department, Bolivia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Lollingite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.8868:1:0.4814
Help on Cell Dimensions: Cell Dimensions: a = 5.25, b = 5.92, c = 2.85, Z = 2; V = 88.58 Den(Calc)= 7.71
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.61(1), 2.33(0.9), 1.638(0.8),
Help on Forms: Forms:

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Forms: [ 1 0 1] [ 1 4 0] [ 1 1 0]

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Ondrus P , Vavrin I , Skala R , Veselovsky F , Neues Jahrbuch fur Mineralogie, Monatshefte , 2001 (2001) p.169-185, Low-temperature Ni-rich lollingite from Haje, Pibram, Czech Republic., Rietveld crystal structure refinement, Locality: Haje, Pibram, Czech Republic

View Additional jPOWD Structure files for Lollingite
[1]
 

Physical Properties of Lollingite

Help on Cleavage: Cleavage: [001] Distinct
Help on Color: Color: Silvery white, Tarnish gray.
Help on Density: Density: 7.1 - 7.7, Average = 7.4
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Magnetic after heating
Help on Streak: Streak: grayish black
 

Optical Properties of Lollingite

Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Lollingite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   49.20   55.50 
   
 420 nm   50.30   56.20 
 440 nm   51.40   56.90 
 460 nm   52.20   56.60 
 480 nm   52.60   55.80 
 500 nm   52.90   54.80 
 520 nm   53.20   54.00 
 540 nm   53.60   53.10 
 560 nm   54.00   52.40 
 580 nm   54.20   51.70 
 600 nm   54.30   51.10 
 620 nm   54.20   50.50 
 640 nm   53.90   50.00 
 660 nm   53.50   49.60 
 680 nm   53.00   49.20 
 700 nm   52.60   48.90 
Calculated Relative Intensity Colors of Lollingite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 180%
R1                    
R2                    
 

Calculated Properties of Lollingite

Help on Electron Density: Electron Density:

relectron=6.90 gm/cc
note: rLollingite =7.71 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00575
Boson Index = 0.99425
Help on Photoelectric: Photoelectric:

PELollingite = 61.29 barns/electron
U=PELollingite x relectron= 422.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lollingite is Not Radioactive
 

Lollingite Classification
Help on Dana Class: Dana Class: 2.12.2.9 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.2)Marcasite Group (Orthorhombic: Pnnm)
 
2.12.2.1 Marcasite FeS2 Pnnm 2/m 2/m 2/m
 
2.12.2.2 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.3 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
2.12.2.4 Hastite CoSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.5 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
2.12.2.6 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.7 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.8 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.9 Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
2.12.2.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m
 
2.12.2.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
2.12.2.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: II/D.23-10 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.23 - Löllingite - Costibite series
 
II/D.23-10 Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
II/D.23-20 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 
II/D.23-30 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
II/D.23-40 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m
 
II/D.23-50 Nisbite NiSb2 Pnnm 2/m 2/m 2/m
 
II/D.23-60 Costibite CoSbS P mn21 mm2
 
II/D.23-70 Oenite! CoSbAs Unk Ortho
 

Other Lollingite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Lollingite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Applied Mineralogy 6 -Athena 7 - EUROmin Project 8 - Franklin Minerals(Palache) 9 -Google Images 10 -Google Scholar 11 -Handbook of Mineralogy (UofA) 12 -MinDAT 13 -MinMax(Deutsch) 14 -MinMax(English) 15 -Mineralienatlas (Deutsch) 16 -QUT Mineral Atlas 17 - WWW-MINCRYST 18 -École des Mines de Paris

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Lollingite

FeAs2
Dana No: 2.12.2.9 Strunz No: II/D.23-10
Locality:

 

Notes:

 
 
   
 
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