Arsenopyrite Mineral Data + Say ARSENOPYRITE

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General Arsenopyrite Information
Help on Chemical Formula: Chemical Formula: FeAsS
Help on Composition: Composition: Molecular Weight = 162.83 gm
   Iron     34.30 %  Fe
   Arsenic  46.01 %  As
   Sulfur   19.69 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Fe3+AsS
Help on Environment: Environment: High temperature veins. Found in igneous pegmatites and contact metamorphic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1847
Help on Locality: Locality: Most common arsenic-bearing mineral found world wide. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the minerals chemical composition.
Help on Synonym: Synonym: Arsenical pyrite
  Bismuthian Arsenopyrite
  Cobaltian Arsenopyrite
  ICSD 62400
  Mispickel
  PDF 42-1320
 

Arsenopyrite Image

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Arsenopyrite   Siderite

Comments: White, metallic arsenopyrite and tan siderite crystals.
Location: Panasqueira (2000, 3rd level), in the region of Beira Baixa, Portugal. Scale: 11 x 7 cm.
© Fabre Minerals

Arsenopyrite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0105:1:1.0193
Help on Cell Dimensions: Cell Dimensions: a = 5.74, b = 5.68, c = 5.79, Z = 4; beta = 112.17° V = 174.82 Den(Calc)= 6.19
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.662(1), 2.677(1), 2.418(0.95),
Help on Forms: Forms:

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Forms: [ 0 1 2] [ 1 1 0]

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Morimoto N , Clark L A , American Mineralogist , 46 (1961) p.1448-1469, Arsenopyrite crystal-chemical relations, From Freiberg, Germany

 

Physical Properties of Arsenopyrite

Help on Cleavage: Cleavage: [110] Distinct
Help on Color: Color: Tin white, Light steel gray.
Help on Density: Density: 6.07
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Magnetic after heating
Help on Streak: Streak: black
 

Optical Properties of Arsenopyrite

Help on RL Anisotrophism: RL Anisotrophism: Strong, red-violet.
Help on RL Color: RL Color: White, faint yellow tint.
Help on RL Pleochroism: RL Pleochroism: Weak, white with bluish tint to faint reddish yell.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Arsenopyrite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   49.90   53.00 
   
 420 nm   49.20   53.00 
 440 nm   48.50   53.00 
 460 nm   48.30   53.00 
 480 nm   48.50   52.80 
 500 nm   48.90   52.70 
 520 nm   49.40   52.40 
 540 nm   49.70   52.00 
 560 nm   50.20   51.60 
 580 nm   50.50   51.30 
 600 nm   50.80   51.10 
 620 nm   51.00   50.80 
 640 nm   51.10   50.70 
 660 nm   51.10   50.60 
 680 nm   51.10   50.50 
 700 nm   51.00   50.50 
Calculated Relative Intensity Colors of Arsenopyrite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 180%
R1                    
R2                    
 

Calculated Properties of Arsenopyrite

Help on Electron Density: Electron Density:

relectron=5.70 gm/cc
note: rArsenopyrite =6.19 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00874
Boson Index = 0.99126
Help on Photoelectric: Photoelectric:

PEArsenopyrite = 44.13 barns/electron
U=PEArsenopyrite x relectron= 251.61 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Arsenopyrite is Not Radioactive
 

Arsenopyrite Classification
Help on Dana Class: Dana Class: 2.12.4.1 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.4)Arsenopyrite Group (Monoclinic: P21/c (Pseudo-orthorhombic))
 
2.12.4.1 Arsenopyrite FeAsS P 21/c 2/m
 
2.12.4.2 Gudmundite FeSbS P 21/n 2/m
 
2.12.4.3 Osarsite (Os,Ru)AsS P 21/c 2/m
 
2.12.4.4 Ruarsite RuAsS P 21/c 2/m
 
2.12.4.5 Iridarsenite (Ir,Ru)As2 P 21/c 2/m
 
2.12.4.6 Clinosafflorite (Co,Fe,Ni)As2 P 21/n 2/m
Help on Strunz Class: Strunz Class: II/D.22-10 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.22 - Arsenopyrite series
 
II/D.22-10 Arsenopyrite FeAsS P 21/c 2/m
 
II/D.22-20 Glaucodot (Co,Fe)AsS C mmm 2/m 2/m 2/m
 
II/D.22-30 Gudmundite FeSbS P 21/n 2/m
 
II/D.22-40 Ruarsite RuAsS P 21/c 2/m
 
II/D.22-50 Osarsite (Os,Ru)AsS P 21/c 2/m
 
II/D.22-60 Alloclasite (Co,Fe)AsS P 22121 2 2 2
 

Other Arsenopyrite Information
Help on References: References: NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Arsenopyrite :
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 - Crocoite.com Mineral Locations 8 - EUROmin Project 9 - Franklin Minerals(Dunn) 10 - Franklin Minerals(Palache) 11 -Google Images 12 -Google Scholar 13 -Handbook of Mineralogy (UofA) 14 - HyperPhysics 15 -MinDAT 16 -MinMax(Deutsch) 17 -MinMax(English) 18 - Mineral and Gemstone Kingdom 19 -Mineralienatlas (Deutsch) 20 - Minerals of Wisconsin 21 - Philatelic Mineralogy 22 -QUT Mineral Atlas 23 - Scandinavian mineral gallery 24 - WWW-MINCRYST 25 -theimage 26 -École des Mines de Paris

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Arsenopyrite

FeAsS
Dana No: 2.12.4.1 Strunz No: II/D.22-10
Locality:

 

Notes:

 
 
   
 
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