Xanthoconite Mineral Data + Say XANTHOCONITE


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General Xanthoconite 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: Usually associated with other silver sulfosalts in hydrothermal veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1840
Help on Locality: Locality: Freiberg, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek xanthos, "yellow" and konis "powder."
Help on Synonym: Synonym: ICSD 36352
  PDF 21-1455
  Rittingerite
 

Xanthoconite Image

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Xanthoconite

Comments: Wine-colored, tabular crystal of xanthoconite on matrix.
Location: Schlema, Schlema-Hartenstein area, Erzgebirge, Saxony, Germany. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

Xanthoconite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.7342:1:1.9307
Help on Cell Dimensions: Cell Dimensions: a = 16.98, b = 6.21, c = 11.99, Z = 8; beta = 110.167° V = 1,186.78 Den(Calc)= 5.54
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3(1), 2.82(0.6), 3.14(0.3),
Help on Forms: Forms:

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Forms: [ 5 5 1] [ 5 0 1] [ 1 1 0] [ 1 0 0] [ 0 0 1]

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Click Here for Large Xanthoconite Structure Window Crystal Structure:

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Engel P , Nowacki W , Acta Crystallographica, Section B , 24 (1968) p.77-81, Die kristallstruktur von Ag3AsS3

 

Physical Properties of Xanthoconite

Help on Cleavage: Cleavage: [001] Distinct
Help on Color: Color: Dark crimson red, Dark orange, Brown, Lemon yellow.
Help on Density: Density: 5.5 - 5.6, Average = 5.55
Help on Diaphaniety: Diaphaniety: Subtranslucent to opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Reniform - "Kidney like" in shape (e.g.. hematite).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Adamantine
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: orange yellow
 

Optical Properties of Xanthoconite

Help on Optical Data: Optical Data: Biaxial (-), b=3, 2V(Meas)=34. Dispersion r < v.
Help on RL Color: RL Color: Lemon yellow.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Xanthoconite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   33.70   37.10 
   
 420 nm   32.20   36.10 
 440 nm   30.70   35.10 
 460 nm   29.10   33.70 
 480 nm   27.60   32.10 
 500 nm   26.10   30.10 
 520 nm   24.80   28.50 
 540 nm   23.70   27.30 
 560 nm   22.70   26.30 
 580 nm   22.00   25.50 
 600 nm   21.50   24.80 
 620 nm   21.30   24.40 
 640 nm   21.00   24.10 
 660 nm   20.80   23.80 
 680 nm   20.60   23.60 
 700 nm   20.40   23.50 
Calculated Relative Intensity Colors of Xanthoconite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360% 390%
R1                        
R2                        
 

Calculated Properties of Xanthoconite

Help on Electron Density: Electron Density:

relectron=4.97 gm/cc
note: rXanthoconite =5.54 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00145
Boson Index = 0.99855
Help on Photoelectric: Photoelectric:

PEXanthoconite = 178.15 barns/electron
U=PEXanthoconite x relectron= 885.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Xanthoconite is Not Radioactive
 

Xanthoconite Classification
Help on Dana Class: Dana Class: 3.4.2.1 (3)Sulfides - Sulfosalts
  (3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.4.2)Dana Group
 
3.4.2.1 Xanthoconite Ag3AsS3 A2/a 2/m
 
3.4.2.2 Pyrostilpnite Ag3SbS3 P 21/c 2/m
Help on Strunz Class: Strunz Class: II/E.07-30 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 Xanthoconite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Xanthoconite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Xanthoconite

Ag3AsS3
Dana No: 3.4.2.1 Strunz No: II/E.07-30
Locality:

 

Notes:

 
 
   
 
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