Argentite Mineral Data + Say ARGENTITE


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General Argentite Information

Help on Chemical  Formula: Chemical Formula: Ag2S
Help on Composition: Composition: Molecular Weight = 247.80 gm
   Silver  87.06 %  Ag
   Sulfur  12.94 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Ag2S
Help on Environment: Environment: Low temperature ore veins.
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Mexico, Saxony, Great Britain and Kongsberg, Norway are notable localities. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: After the Latin, argentum, meaning "silver". From the Greek, akanta, meaning "arrow." Argentite is stable above 179 C. Acanthite is stable below 179 C.
Help on Synonym: Synonym: ICSD 9586
  PDF 4-774
  Silver Glance
 

Argentite Image

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Argentite   Acanthite

Comments: Dark metallic acanthite crystals up to 3 mm. Most of the crystals are a cubic habit, so the acanthite is pseudomorphing the original argentite.
Location: San Juan de Rayas Mine (Rayas Mine), Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico. Scale: 18x12x12 mm.
© John Betts - Fine Minerals

Argentite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 4.89, Z = 2; V = 116.93 Den(Calc)= 7.04
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.819(1), 2.24(1), 3.17(1),
Help on Forms: Forms:

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

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Physical Properties of Argentite

Help on Cleavage: Cleavage: [001] Poor, [110] Poor
Help on Color: Color: Black, Lead gray.
Help on Density: Density: 7.2 - 7.4, Average = 7.3
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Arborescent - "Tree like" growths of branched systems (e.g. silver).
Help on Habit: Habit: Blocky - Crystal shape tends to be equant (e.g. feldspars).
Help on Habit: Habit: Skeletal - Crystals form crude outlines with missing faces.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black
 

Calculated Properties of Argentite

Help on Electron Density: Electron Density:

relectron=6.25 gm/cc
note: rArgentite =7.04 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00097
Boson Index = 0.99903
Help on Photoelectric: Photoelectric:

PEArgentite = 224.26 barns/electron
U=PEArgentite x relectron=1,401.66 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Argentite is Not Radioactive

 

Argentite Classification

Help on  Dana Class: Dana Class: 2.0.0.0 (2)Sulfide Minerals
  (2.0)Without Dana Classification Numbers
  (Chalcocite Group)
Help on  Strunz Class: Strunz Class: II/B.05-02 II - Sulfides and sulphosalts
  II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Sulfides, Selenides and Tellurides with predominant Copper and Silver/Gold
  II/B.05 - Achantite - Empresite series
 
II/B.05-02 Argentite Ag2S I m3m 4/m 3 2/m
 
II/B.05-10 Acanthite Ag2S P 21/n 2/m
 
II/B.05-30 Naumannite Ag2Se P 212121 2 2 2
 
II/B.05-35 Kurilite* (Ag,Au)2(Te,Se,S) P m3n,P 43n Cubic
 
II/B.05-40 Hessite Ag2Te P 21/c 2/m
 
II/B.05-50 Aguilarite Ag4SeS P 212121 2 2 2
 
II/B.05-60 Cervelleite Ag4TeS Unk Cubic
 
II/B.05-70 Benleonardite Ag8(Sb,As)Te2S3 Tetra Tetra
 
II/B.05-75 Tsnigriite Ag9SbTe3(S,Se)3 P 2/m,Pm Mono
 
II/B.05-80 Stutzite Ag5-xTe3,(x=0.24-0.36) P 6/mmm 6/m 2/m 2/m
 
II/B.05-90 Empressite AgTe Pmnb 2/m 2/m 2/m
 

Other Argentite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Argentite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - Glendale Community College 7 -Google Images 8 -Google Scholar 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 - Mineral and Gemstone Kingdom 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 - Scandinavian mineral gallery 16 - WWW-MINCRYST

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Argentite

Ag2S
Dana No: Unknown Strunz No: II/B.05-02
Locality:

 

Notes:

 

 
   
 
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