Mineralogy Database

Miargyrite Mineral Data

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General Miargyrite Information

Help on Chemical  Formula: Chemical Formula: AgSbS2
Help on Composition: Composition: Molecular Weight = 293.75 gm
   Silver    36.72 %  Ag
   Antimony  41.45 %  Sb
   Sulfur    21.83 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: AgSbS2
Help on Environment: Environment: In low-temperature hydrothermal silver-bearing sulfide ores.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1829
Help on Locality: Locality: Braunsdorf, Freiberg, Sachsen (Saxony), Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, meyon, "smaller" and argyros, "silver." in allusion to the lessor silver content of the mineral.
Help on Name Pronunciation: Name Pronunciation: Miargyrite + Pronunciation Say MIARGYRITE
Help on Synonym: Synonym: ICSD 85130
  PDF 19-1137
 

Miargyrite Image

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  Miargyrite

Comments: Metallic miargyrite crystal on quartz.
Location: Braunsdorf, Saxony, Germay. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Aramayoite   Miargyrite

Comments: Aramayoite is present as large thin plates (blue iridescence) to 1mm in massive gray miargyrite matrix.
Location: Julcani Silver mine, Huancavelica Dept., Peru. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Miargyrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.9172:1:3.0122
Help on Cell Dimensions: Cell Dimensions: a = 12.862, b = 4.409, c = 13.281, Z = 8; beta = 98.48° V = 744.91 Den(Calc)= 5.24
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.89(1), 3.45(0.9), 2.75(0.8),
Help on Forms: Forms:

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Help on Above

Forms: ( 2 1 3) ( 1 1 1) ( 1 0 1) ( 1 0 1) ( 0 1 0) ( 3 1 1) ( 1 2 4) ( 2 1 1) ( 1 0 0) ( 0 0 1)

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Physical Properties of Miargyrite

Help on Cleavage: Cleavage: {010} Imperfect
Help on Color: Color: Steel gray, Lead gray, Blackish red, Reddish gray.
Help on Density: Density: 5.1 - 5.3, Average = 5.19
Help on Diaphaneity: Diaphaneity: Translucent to Subopaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
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: Non-fluorescent.
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: cherry red
 

Optical Properties of Miargyrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -4.079 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -4.04 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.334,KPDmeas= 0.3365,KC= 0.0663
Ncalc = 1.34 - 1.35
Help on Optical Data: Optical Data: Biaxial (+), a=2.72, g=2.78, bire=0.0600
Help on Pleochroism (x): Pleochroism (x): deep cherry red.
Help on Pleochroism (z): Pleochroism (z): deep cherry red.
Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Color: RL Color: White with raspberry-red internal reflections in oil, seldom seen in air.
Help on RL Pleochroism: RL Pleochroism: Distinct, in whites, light gray-whites, and whitish grays.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Miargyrite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   37.30   39.80 
   
 420 nm   37.10   40.00 
 440 nm   36.90   39.45 
 460 nm   36.50   39.05 
 480 nm   35.85   38.60 
 500 nm   34.95   38.05 
 520 nm   34.05   37.30 
 540 nm   33.30   36.55 
 560 nm   32.75   35.90 
 580 nm   32.10   35.30 
 600 nm   31.30   34.75 
 620 nm   30.55   34.00 
 640 nm   29.90   33.20 
 660 nm   29.25   32.35 
 680 nm   28.80   31.85 
 700 nm   28.60   31.55 
Standardized Intensity (100%) Reflection Spectra of Miargyrite in Oil
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   22.00   24.90 
   
 420 nm   21.85   24.95 
 440 nm   21.55   24.40 
 460 nm   21.10   23.85 
 480 nm   20.35   23.35 
 500 nm   19.45   22.60 
 520 nm   18.60   21.90 
 540 nm   17.95   21.20 
 560 nm   17.40   20.50 
 580 nm   16.80   19.95 
 600 nm   16.20   19.50 
 620 nm   15.50   18.75 
 640 nm   14.90   18.00 
 660 nm   14.40   17.30 
 680 nm   14.05   16.85 
 700 nm   13.95   16.75 
Calculated Relative Intensity Colors of Miargyrite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270% 290%
R1                        
R2                        
Calculated Relative Intensity Colors of Miargyrite in Oil
Relative
Intensity
   0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 540% 550%
R1                        
R2                        
 

Calculated Properties of Miargyrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.64 gm/cc
note: Specific Gravity of Miargyrite =5.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0016374117
Boson Index = 0.9983625883
Help on Photoelectric: Photoelectric: PEMiargyrite = 233.54 barns/electron
U=PEMiargyrite x rElectron Density=1,083.15 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Miargyrite is Not Radioactive
 

Miargyrite Classification

Help on  Dana Class: Dana Class: 03.07.03.02 (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.03)Dana Group
 
03.07.03.01 Smithite AgAsS2 A2/a 2/m
 
03.07.03.02 Miargyrite AgSbS2 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 02.HA.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HA -With Cu, Ag, Fe (without Pb)
 
02.HA.10 Miargyrite AgSbS2 C 2/c 2/m
 

Other Miargyrite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Min, 2nd ed.,1990, AmMin, Vol 87, p 753) OPTIC PROP.(AmMin, Vol 87, p 735)
Help on See Also: See Also: Links to other databases for Miargyrite :
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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Miargyrite

AgSbS2
Dana No: 03.07.03.02 Strunz No: 02.HA.10
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