Arsenopyrite Mineral Data (original) (raw)
General Arsenopyrite Information
Chemical Formula:
FeAsS
Composition:
Molecular Weight = 162.83 gm
Iron 34.30 % Fe
Arsenic 46.01 % As
Sulfur 19.69 % S
______
100.00 %
Empirical Formula:
Fe3+AsS
Environment:
High temperature veins. Found in igneous pegmatites and contact metamorphic rocks.
IMA Status:
Valid Species (Pre-IMA) 1847
Locality:
Most common arsenic-bearing mineral found world wide. Link to MinDat.org Location Data.
Name Origin:
Named after the minerals chemical composition.
Name Pronunciation:
Arsenopyrite + Pronunciation 
Synonym:
Arsenical pyrite
Bismuthian Arsenopyrite
Cobaltian Arsenopyrite
ICSD 62400
Mispickel
PDF 42-1320
Arsenopyrite Image
Images:
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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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Images:
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Arsenopyrite 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 |
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Arsenopyrite Crystallography
Axial Ratios:
a:b:c =1.0105:1:1.0193
Cell Dimensions:
a = 5.74, b = 5.68, c = 5.79, Z = 4; beta = 112.17° V = 174.82 Den(Calc)= 6.19
Crystal System:
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
X Ray Diffraction:
By Intensity(I/Io): 2.662(1), 2.677(1), 2.418(0.95),
Forms:
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| | Forms:( 0 1 2) ( 1 1 0) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | -------------------------------------------------------------------------------------------------------------------------------------- |
Crystal Structure:
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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
Cleavage:
{110} Distinct
Color:
Tin white, Light steel gray.
Density:
6.07
Diaphaneity:
Opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Striated - Parallel lines on crystal surface or cleavage face.
Hardness:
5 - Apatite
Luminescence:
Non-fluorescent.
Luster:
Metallic
Magnetism:
Magnetic after heating
Streak:
black
Optical Properties of Arsenopyrite
RL Anisotrophism:
Strong, red-violet.
RL Color:
White, faint yellow tint.
RL Pleochroism:
Weak, white with bluish tint to faint reddish yell.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Arsenopyrite in Air
| λ | R1 | R 2 |  |
∑ R1(λ) | ∑ R2(λ) |
|---|---|---|---|---|---|
| 400 nm | 49.90 | 53.00 |  |
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| 420 nm | 49.20 | 53.00 |  |
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| 440 nm | 48.50 | 53.00 |  |
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| 460 nm | 48.30 | 53.00 |  |
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| 480 nm | 48.50 | 52.80 |  |
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| 500 nm | 48.90 | 52.70 |  |
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| 520 nm | 49.40 | 52.40 |  |
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| 540 nm | 49.70 | 52.00 |  |
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| 560 nm | 50.20 | 51.60 |  |
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| 580 nm | 50.50 | 51.30 |  |
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| 600 nm | 50.80 | 51.10 |  |
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| 620 nm | 51.00 | 50.80 |  |
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| 640 nm | 51.10 | 50.70 |  |
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| 660 nm | 51.10 | 50.60 |  |
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| 680 nm | 51.10 | 50.50 |  |
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| 700 nm | 51.00 | 50.50 |  |
Calculated Relative Intensity Colors of Arsenopyrite in Air
| RelativeIntensity | 0% | 20% | 40% | 60% | 80% | 100% | 120% | 140% | 160% | 180% |
|---|---|---|---|---|---|---|---|---|---|---|
| R1 | ||||||||||
| R2 |
Calculated Properties of Arsenopyrite
Electron Density:
Bulk Density (Electron Density)=5.70 gm/cc
note: Specific Gravity of Arsenopyrite =6.19 gm/cc.
Fermion Index:
Fermion Index = 0.0087478423
Boson Index = 0.9912521577
Photoelectric:
PEArsenopyrite = 44.13 barns/electron
U=PEArsenopyrite x rElectron Density= 251.61 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arsenopyrite is Not Radioactive
Arsenopyrite Classification
Dana Class:
02.12.04.01 (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))
02.12.04.01 Arsenopyrite FeAsS P 21/c 2/m
02.12.04.02 Gudmundite FeSbS P 21/n 2/m
02.12.04.03 Osarsite (Os,Ru)AsS P 21/c 2/m
02.12.04.04 Ruarsite RuAsS P 21/c 2/m
02.12.04.05 Iridarsenite (Ir,Ru)As2 P 21/c 2/m
02.12.04.06 Clinosafflorite (Co,Fe,Ni)As2 P 21/n 2/m
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
References:
NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
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
24 - WWW-MINCRYST
25 - theimage
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Print or Cut-and-Paste your Arsenopyrite Specimen Label here :
Arsenopyrite
FeAsS
Dana No: 02.12.04.01 Strunz No: 02.EB.20
Locality:
Notes: