Mineralogy Database

Dyscrasite Mineral Data

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General Dyscrasite Information

Help on Chemical  Formula: Chemical Formula: Ag3Sb
Help on Composition: Composition: Molecular Weight = 445.35 gm
   Silver    72.66 %  Ag
   Antimony  27.34 %  Sb
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ag3Sb
Help on Environment: Environment: Occurs in some silver deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Wolfach, Baden, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, meaning "bad alloy."
Help on Name Pronunciation: Name Pronunciation: Dyscrasite + Pronunciation Say DYSCRASITE
Help on Synonym: Synonym: Antimonsilver
  ICSD 64698
  PDF 10-452
 

Dyscrasite Image

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  Dyscrasite

Comments: Metallic-silver, prismatic, crystallized dyscrasite. Individual crystal spears to 8 mm in size.
Location: Mine #21, Pribram, Bohemia, Czech Republic. Scale: 6 x 10 x 6.5 cm.
© Dan Weinrich

Dyscrasite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5723:1:0.9226
Help on Cell Dimensions: Cell Dimensions: a = 2.996, b = 5.235, c = 4.83, Z = 1; V = 75.75 Den(Calc)= 9.76
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pm2m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.29(1), 1.37(0.4), 2.42(0.4),
Help on Forms: Forms:

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Help on Above

Forms: ( 0 2 1) ( 1 1 1)

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Physical Properties of Dyscrasite

Help on Cleavage: Cleavage: {001} Distinct, {011} Distinct, {110} Imperfect
Help on Color: Color: Gray, Yellow, Black, Silver white.
Help on Density: Density: 9.4 - 10, Average = 9.69
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: silver white
 

Optical Properties of Dyscrasite

Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Color: RL Color: Silver white, tarnishing to lead-gray, yellowish, or black.
Help on RL Pleochroism: RL Pleochroism: Very weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Dyscrasite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   57.00   57.70 
   
 420 nm   57.70   59.00 
 440 nm   58.30   60.10 
 460 nm   59.10   61.20 
 480 nm   59.60   61.70 
 500 nm   59.90   62.10 
 520 nm   60.00   62.40 
 540 nm   60.10   62.70 
 560 nm   60.00   62.90 
 580 nm   59.80   63.00 
 600 nm   59.60   63.00 
 620 nm   59.50   63.00 
 640 nm   59.40   63.10 
 660 nm   59.30   63.00 
 680 nm   59.30   63.10 
 700 nm   59.60   63.40 
Calculated Relative Intensity Colors of Dyscrasite in Air
Relative
Intensity
   0%   20%   40%   60%   80% 100% 120% 140% 150%
R1                  
R2                  
 

Calculated Properties of Dyscrasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=8.42 gm/cc
note: Specific Gravity of Dyscrasite =9.76 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PEDyscrasite = 285.26 barns/electron
U=PEDyscrasite x rElectron Density=2,400.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dyscrasite is Not Radioactive
 

Dyscrasite Classification

Help on  Dana Class: Dana Class: 02.02.01.01 (02)Sulfides - Including Selenides and Tellurides
  (02.02)where Am Bn Xp, with (m+n):p=3:1
  (02.02.01)Dyscrasite Group
 
02.02.01.01 Dyscrasite Ag3Sb Pm2m mm2
 
02.02.01.02 Allargentum Ag1-xSbx(x=0.009-0.16) P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.AA.35 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.A - Simple Sulfides, Selenides, etc
  02.AA -Alloys of metalloids with Cu, Ag, Sn, Au
 
02.AA.35 Dyscrasite Ag3Sb Pm2m mm2
 

Other Dyscrasite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Dyscrasite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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Dyscrasite

Ag3Sb
Dana No: 02.02.01.01 Strunz No: 02.AA.35
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