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Argentopentlandite Mineral Data

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General Argentopentlandite Information

Help on Chemical  Formula: Chemical Formula: Ag(Fe,Ni)8S8
Help on Composition: Composition: Molecular Weight = 816.86 gm
   Iron    41.02 %  Fe
   Nickel  14.37 %  Ni
   Silver  13.21 %  Ag
   Sulfur  31.40 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: AgFe2+6Ni2S8
Help on Environment: Environment: In pyrite and cubanite-chalcopyrite hydrothermal veins, and in disseminated sulfide deposits in skarn.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: In the USSR, in the Oktyabr mine, Talnakh area, Noril'sk region, western Siberia, and the Khovuaksinsk Co-Ni deposit. In the Vuonos, Miihkali, Hietajarvi, and Outokumpu deposits, Finla Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the similarity in composition to pentlandite.
Help on Name Pronunciation: Name Pronunciation: Argentopentlandite + Pronunciation Say ARGENTOPENTLANDITE
Help on Synonym: Synonym: ICSD 40051
  PDF 25-406
 

Argentopentlandite Image

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  Argentopentlandite   Maucherite

Comments: Reflected light image of a polished section containing argentopentlandite (AgP) with galena (G), native silver (Ag), chalcopyrite (Ch) and maucherite (M).
Location: Silver City, Ontonagon Co., Michigan, USA. Scale: Picture Size 900 µm.
© Jeff Weissman / Photographic Guide to Mineral Species

Argentopentlandite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.521, Z = 4; V = 1,164.59 Den(Calc)= 4.66
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.858(1), 3.17(1), 2.018(0.4),
 

Physical Properties of Argentopentlandite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Bronze brown.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic
Help on Streak: Streak: reddish brown
 

Optical Properties of Argentopentlandite

Help on RL Color: RL Color: Cinnamon-brown.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Argentopentlandite in Air
λ R  ∑ R(λ) 
 400 nm   20.40   
 420 nm   21.00 
 440 nm   21.90 
 460 nm   22.90 
 480 nm   24.20 
 500 nm   25.60 
 520 nm   27.20 
 540 nm   28.80 
 560 nm   30.40 
 580 nm   31.90 
 600 nm   33.30 
 620 nm   34.60 
 640 nm   35.80 
 660 nm   36.80 
 680 nm   37.80 
 700 nm   38.60 
Calculated Relative Intensity Colors of Argentopentlandite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360% 390%
R                        
 

Calculated Properties of Argentopentlandite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.42 gm/cc
note: Specific Gravity of Argentopentlandite =4.66 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEArgentopentlandite = 51.92 barns/electron
U=PEArgentopentlandite x rElectron Density= 229.26 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Argentopentlandite is Not Radioactive
 

Argentopentlandite Classification

Help on  Dana Class: Dana Class: 02.07.01.02 (02)Sulfides - Including Selenides and Tellurides
  (02.07)where Am Bn Xp, with (m+n):p=9:8
  (02.07.01)Pentalndite Group (Isometric: Fm3m)
 
02.07.01.01 Pentlandite (Fe,Ni)9S8 F m3m 4/m 3 2/m
 
02.07.01.02 Argentopentlandite Ag(Fe,Ni)8S8 F m3m 4/m 3 2/m
 
02.07.01.03 Cobaltpentlandite Co9S8 F m3m 4/m 3 2/m
 
02.07.01.04 Shadlunite (Pb,Cd)(Fe,Cu)8S8 F m3m 4/m 3 2/m
 
02.07.01.05 Manganoshadlunite (Mn,Pb)(Cu,Fe)8S8 F m3m 4/m 3 2/m
 
02.07.01.06 Geffroyite (Ag,Cu,Fe)9(Se,S)8 F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 02.BB.15a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)
  02.BB -With Ni, Fe
 
02.BB.15a Argentopentlandite Ag(Fe,Ni)8S8 F m3m 4/m 3 2/m
 
02.BB.15a Cobaltpentlandite Co9S8 F m3m 4/m 3 2/m
 
02.BB.15a Geffroyite (Ag,Cu,Fe)9(Se,S)8 F m3m 4/m 3 2/m
 
02.BB.15a Manganoshadlunite (Mn,Pb)(Cu,Fe)8S8 F m3m 4/m 3 2/m
 
02.BB.15a Pentlandite (Fe,Ni)9S8 F m3m 4/m 3 2/m
 
02.BB.15a Shadlunite (Pb,Cd)(Fe,Cu)8S8 F m3m 4/m 3 2/m
 

Other Argentopentlandite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Argentopentlandite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Argentopentlandite

Ag(Fe,Ni)8S8
Dana No: 02.07.01.02 Strunz No: 02.BB.15a
Locality:

 

Notes:

 

 
   
 


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