Mineralogy Database

Lollingite Mineral Data

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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: L�lling, H�ttenberg, Carinthia, Austria Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Lollingite + Pronunciation Say LOLLINGITE
Help on Synonym: Synonym: Loellingite
 

Lollingite Image

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  Lollingite

Comments: Sharp, twinned crystals Löllingite 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 - Dipyramidal H-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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Help on Above

Forms: ( 1 0 1) ( 1 4 0) ( 1 1 0)

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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 Diaphaneity: Diaphaneity: 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: Bulk Density (Electron Density)=6.90 gm/cc
note: Specific Gravity of Lollingite =7.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0057560175
Boson Index = 0.9942439825
Help on Photoelectric: Photoelectric: PELollingite = 61.29 barns/electron
U=PELollingite x rElectron Density= 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: 02.12.02.09 (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.02)Marcasite Group (Orthorhombic: Pnnm)
 
02.12.02.01 Marcasite FeS2 Pnnm 2/m 2/m 2/m
 
02.12.02.02 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
02.12.02.03 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
02.12.02.04 Hastite? CoSe2 Pnnm 2/m 2/m 2/m
 
02.12.02.05 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
02.12.02.06 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
02.12.02.07 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
02.12.02.08 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
02.12.02.09 Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
02.12.02.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m
 
02.12.02.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 
02.12.02.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
02.12.02.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.EB.15a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.E - Metal Sulfides, M:S � 1:2
  02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc.
 
02.EB.15a Clinosafflorite (Co,Fe,Ni)As2 P 21/n 2/m
 
02.EB.15a Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
02.EB.15a Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
02.EB.15a Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
02.EB.15a Nisbite NiSb2 Pnnm 2/m 2/m 2/m
 
02.EB.15a Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
02.EB.15a Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 

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 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Palache)
9 - GeoScienceWorld
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST

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Lollingite

FeAs2
Dana No: 02.12.02.09 Strunz No: 02.EB.15a
Locality:

 

Notes:

 

 
   
 


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