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Arsenopyrite Mineral Data

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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 Name Pronunciation: Name Pronunciation: Arsenopyrite + Pronunciation Say ARSENOPYRITE
Help on Synonym: Synonym: Arsenical pyrite
  Bismuthian Arsenopyrite
  Cobaltian Arsenopyrite
  ICSD 62400
  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

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Comments: Polished section (PPL) showing crystalline aggregate of arsenopyrite (asp) in massive sphalerite (sp), typical of the main sphalerite lens.
Location: Giant Kidd Creek Volcanogenic Massive Sulfide deposit, Western Abitibi Subprovince, Timmins, Ontario, Canada. Scale: F.V. = 0.25 mm.
© National Resouces of Canada

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 - Prismatic H-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:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 2) ( 1 1 0)

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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 Diaphaneity: Diaphaneity: 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: Non-fluorescent.
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
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180%

Calculated Properties of Arsenopyrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.70 gm/cc
note: Specific Gravity of Arsenopyrite =6.19 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0087478423
Boson Index = 0.9912521577
Help on Photoelectric: Photoelectric: PEArsenopyrite = 44.13 barns/electron
U=PEArsenopyrite x rElectron Density= 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: (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.04)Arsenopyrite Group (Monoclinic: P21/c (Pseudo-orthorhombic)) Arsenopyrite FeAsS P 21/c 2/m Gudmundite FeSbS P 21/n 2/m Osarsite (Os,Ru)AsS P 21/c 2/m Ruarsite RuAsS P 21/c 2/m Iridarsenite (Ir,Ru)As2 P 21/c 2/m Clinosafflorite (Co,Fe,Ni)As2 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 02.EB.20 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.20 Arsenopyrite FeAsS P 21/c 2/m
02.EB.20 Gudmundite FeSbS P 21/n 2/m
02.EB.20 Ruarsite RuAsS P 21/c 2/m
02.EB.20 Paxite CuAs2 P 21/c 2/m
02.EB.20 Osarsite (Os,Ru)AsS P 21/c 2/m

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 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - Franklin Minerals(Palache)
10 - GeoScienceWorld
11 - Google Images
12 - Google Scholar
13 - Handbook of Mineralogy (MinSocAm)
14 - Handbook of Mineralogy (UofA)
15 - HyperPhysics
16 - MinDAT
17 - Mineral and Gemstone Kingdom
18 - Mineralienatlas (Deutsch)
19 - Online Mineral Museum
20 - Philatelic Mineralogy
21 - QUT Mineral Atlas
22 - Ruff.Info
23 - Scandinavian mineral gallery
25 - theimage

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Dana No: Strunz No: 02.EB.20





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