Argentopentlandite Mineral Data (original) (raw)

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 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 - HexoctahedralH-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),

Click Here for Large Argentopentlandite Structure Window Crystal Structure:

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Help on Above

| | Hall S R , Stewart J M , The Canadian Mineralogist , 12 (1973) p.169-177, The crystal structure of argentian pentlandite (Fe,Ni)8AgS8, compared with, the refined structure of pentlandite (Fe,Ni)9S8 | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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

RelativeIntensity 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: