Proustite Mineral Data + Say PROUSTITE

General Proustite Information
Help on Chemical Formula: Chemical Formula: Ag3AsS3
Help on Composition: Composition: Molecular Weight = 494.72 gm
   Silver   65.41 %  Ag
   Arsenic  15.14 %  As
   Sulfur   19.44 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Ag3AsS3
Help on Environment: Environment: Late forming mineral in hydrothermal deposits, in the oxidized and enriched zone, associated with other silver minerals and sulfides.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Himmelsfurst mine, Erbisdor, near Freiberg, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: After the French chemist, J. L. Proust (1755-1826).
Help on Synonym: Synonym: ICSD 38388
  Light Red Silver Ore
  PDF 42-553
  Ruby Silver Ore
 

Proustite Image

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Proustite

Comments: Crystal group of gemmy, red proustite. Smithsonian collection.
Location: Dolores I Mine, Cha?arcillo, Atac?ma Province, Chile. Scale: Specimen Size 6x8 cm.
© Dave Barthelmy

Proustite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.80064
Help on Cell Dimensions: Cell Dimensions: a = 10.86, c = 8.695, Z = 6; V = 888.10 Den(Calc)= 5.55
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.74(1), 2.48(0.9), 3.27(0.8),
Help on Forms: Forms:

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

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Allen S , Phase Transition , 6 (1985) p.1-24, Phase transitions in proustite I. Structural studies, Sample: T = 35 K

View Additional jPOWD Structure files for Proustite
[1] [2]
 

Physical Properties of Proustite

Help on Cleavage: Cleavage: None
Help on Color: Color: Vermilion, Reddish gray.
Help on Density: Density: 5.5 - 5.6, Average = 5.55
Help on Diaphaniety: Diaphaniety: Transparent to translucent
Help on Fracture: Fracture: Brittle - Sectile - Brittle fracture with slightly sectile shavings possible.
Help on Habit: Habit: Blocky - Crystal shape tends to be equant (e.g. feldspars).
Help on Habit: Habit: Crystalline - Poor - Occurs primarily as crudely formed crystals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Sub Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: vermilion red
 

Optical Properties of Proustite

Help on Dichroism (e): Dichroism (e): scarlet-vermilion.
Help on Dichroism (w): Dichroism (w): blood-red.
Help on Optical Data: Optical Data: Uniaxial (-), e=2.792, w=3.087-3.088, bire=0.2950-0.2960.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Proustite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   36.90   39.60 
   
 420 nm   36.80   39.50 
 440 nm   36.70   39.40 
 460 nm   35.80   38.20 
 480 nm   34.00   36.80 
 500 nm   32.50   35.00 
 520 nm   31.20   33.50 
 540 nm   30.00   32.30 
 560 nm   29.00   31.20 
 580 nm   28.20   30.30 
 600 nm   27.50   29.60 
 620 nm   26.90   29.00 
 640 nm   26.30   28.50 
 660 nm   25.90   28.20 
 680 nm   25.40   27.90 
 700 nm   25.00   27.60 
Calculated Relative Intensity Colors of Proustite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320%
R1                    
R2                    
 

Calculated Properties of Proustite

Help on Electron Density: Electron Density:

relectron=4.98 gm/cc
note: rProustite =5.55 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00145
Boson Index = 0.99855
Help on Photoelectric: Photoelectric:

PEProustite = 178.15 barns/electron
U=PEProustite x relectron= 887.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Proustite is Not Radioactive
 

Proustite Classification
Help on Dana Class: Dana Class: 3.4.1.1 (3)Sulfides - Sulfosalts
  (3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.4.1)Dana Group
 
3.4.1.1 Proustite Ag3AsS3 R 3c 3 2/m
 
3.4.1.2 Pyrargyrite Ag3SbS3 R 3c 3m
Help on Strunz Class: Strunz Class: II/E.07-10 II - Sulfides and sulphosalts
  II/E - Sulfosalts (S : As,Sb,Bi = x) Sulfosalts with predominant Silver, x = 6.0 - 1.6
  II/E.07 - Proustite - Samsonite series
 
II/E.07-10 Proustite Ag3AsS3 R 3c 3 2/m
 
II/E.07-20 Pyrargyrite Ag3SbS3 R 3c 3m
 
II/E.07-30 Xanthoconite Ag3AsS3 A2/a 2/m
 
II/E.07-40 Pyrostilpnite Ag3SbS3 P 21/c 2/m
 
II/E.07-50 Samsonite Ag4MnSb2S6 P 2/n 2/m
 
II/E.07-60 Quadratite! Ag(Cd,Pb)AsS3 I 4/amd 4/m 2/m 2/m
 

Other Proustite Information
Help on References: References: NAME( ODonoghue90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Proustite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 - Philatelic Mineralogy 15 -QUT Mineral Atlas 16 - Tradeshop.com - The Rainbow of Gems 17 - WWW-MINCRYST 18 -École des Mines de Paris

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Proustite

Ag3AsS3
Dana No: 3.4.1.1 Strunz No: II/E.07-10
Locality:

 

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