Lollingite Mineral Data

General Lollingite Information

Chemical Formula:

FeAs2

Composition:

Molecular Weight = 205.69 gm

Iron 27.15 % Fe

Arsenic 72.85 % As

______

100.00 %

Empirical Formula:

Fe²⁺As₂

Environment:

In mesotherma deposits associated with other sufides and calcite gangue; also found in pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1845

Locality:

Lölling, Hüttenberg, Carinthia, Austria Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Lollingite + Pronunciation

Synonym:

Loellingite

Lollingite Image

Images:

Lollingite

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

Lollingite Crystallography

Axial Ratios:

a:b:c =0.8868:1:0.4814

Cell Dimensions:

a = 5.25, b = 5.92, c = 2.85, Z = 2; V = 88.58 Den(Calc)= 7.71

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/I_o): 2.61(1), 2.33(0.9), 1.638(0.8),

Forms:

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

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Crystal Structure:

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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

Cleavage:

{001} Distinct

Color:

Silvery white, Tarnish gray.

Density:

7.1 - 7.7, Average = 7.4

Diaphaneity:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Twinning Common - Crystals are usually twinned.

Hardness:

5 - Apatite

Luminescence:

Non-fluorescent.

Luster:

Metallic

Magnetism:

Magnetic after heating

Streak:

grayish black

Optical Properties of Lollingite

RL Anisotrophism:

Strong.

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

Electron Density:

Bulk Density (Electron Density)=6.90 gm/cc
note: Specific Gravity of Lollingite =7.71 gm/cc.

Fermion Index:

Fermion Index = 0.0057560175
Boson Index = 0.9942439825

Photoelectric:

PE_Lollingite= 61.29 barns/electron
U=PE_Lollingite x rElectron Density= 422.74 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lollingite is Not Radioactive

Lollingite Classification

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

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

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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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Print or Cut-and-Paste your Lollingite Specimen Label here :

Lollingite

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

Notes: