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Mutnovskite Mineral Data

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General Mutnovskite Information

Help on Chemical  Formula: Chemical Formula: Pb2AsS3(I,Cl,Br)
Help on Composition: Composition: Molecular Weight = 670.21 gm
   Bismuth    0.62 %  Bi
   Arsenic   10.96 %  As
   Lead      61.52 %  Pb
   Selenium   0.24 %  Se
   Sulfur    14.26 %  S
   Iodine     8.90 %  I
   Bromine    1.07 %  Br
   Chlorine   2.43 %  Cl
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb1.99As0.98Bi0.02S2.98Se0.02I0.47Cl0.46Br0.09
Help on Environment: Environment: Volcanic sublimates (250 deg C) in fumaroles.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Mutnovsky volcano, Kamchatka Peninsula, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2004-032
 

Mutnovskite Image

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  Mutnovskite

Comments: SEM of blocky crystals of mutnovskite. Needle-like crystals of unknown Pb-Bi-As halogensulfosalts, currently under study, appear on the left. AmMin, v91, p22.
Location: Mutnovsky volcano, Kamchatka Peninsula, Russian Federation. Scale: See Image.
© American Mineralogist

Mutnovskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7289:1:1.4018
Help on Cell Dimensions: Cell Dimensions: a = 11.543, b = 6.6764, c = 9.359, Z = 4; V = 721.26 Den(Calc)= 6.17
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.19(1)(212), 3.34(0.73)(020), 4.37(0.67)(210),2.648(0.66)(410), 2.715(0.61)(022), 4.69(0.32)(002), 2.539(0.31)(213), 1.894(0.3)(232), 2.455(0.29)(402),
 

Physical Properties of Mutnovskite

Help on Cleavage: Cleavage: Unknown, Unknown, Unknown
Help on Color: Color: Ruby red, Brownish red.
Help on Diaphaneity: Diaphaneity: Translucent to subtranslucent
Help on Fracture: Fracture: Unknown - Minerals too small to observe fractures.
Help on Habit: Habit: Blocky - Crystal shape tends to be equant (e.g. feldspars).
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Subadamantine
 

Optical Properties of Mutnovskite

Help on Optical Data: Optical Data: NCalc= 1.19 - from Gladstone-Dale relationship (KC = 0.0313) where Ncalc=Dcalc*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Not visible because of orange internal reflections.
Help on RL Color: RL Color: Silvery lead gray with strong orange internal reflections.
Help on RL Pleochroism: RL Pleochroism: Not visible because of orange internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Mutnovskite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   39.20   44.10 
   
 420 nm   38.60   39.40 
 440 nm   36.50   37.60 
 460 nm   35.30   36.20 
 470 nm   34.20   34.60 
 480 nm   33.90   34.20 
 500 nm   33.70   34.00 
 520 nm   33.60   33.80 
 540 nm   33.40   33.60 
 546 nm   33.20   33.50 
 560 nm   32.90   33.10 
 580 nm   32.70   32.80 
 589 nm   32.50   32.70 
 600 nm   32.20   32.50 
 620 nm   31.90   32.10 
 640 nm   31.70   31.90 
 650 nm   31.40   31.70 
 660 nm   31.20   31.40 
 680 nm   30.90   31.00 
 700 nm   30.70   30.80 
Calculated Relative Intensity Colors of Mutnovskite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270%
R1                      
R2                      
 

Calculated Properties of Mutnovskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.18 gm/cc
note: Specific Gravity of Mutnovskite =6.17 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.13
Boson Index = 0.87
Help on Photoelectric: Photoelectric: PEMutnovskite =1,182.91 barns/electron
U=PEMutnovskite x rElectron Density=6,129.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mutnovskite is Not Radioactive
 

Mutnovskite Classification

Help on  Dana Class: Dana Class: 02.15.07.01 (02)Sulfides - Including Selenides and Tellurides
  (02.15)(Chlorides)
  (02.15.07)Dana Group
 
02.15.07.01 Mutnovskite! Pb2AsS3(I,Cl,Br) P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.GC.50 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.G - Sulfarsenites, sulfantimonites, sulfbismuthites
  02.GC -Poly-sulfarsenites
 
02.GC.50 Mutnovskite! Pb2AsS3(I,Cl,Br) P nma 2/m 2/m 2/m
 

Other Mutnovskite Information

Help on References: References: NAME( AmMin, v91, p21) PHYS. PROP.(AmMin, v91, p21) OPTIC PROP.(AmMin, v91, p21)
Help on See Also: See Also: Links to other databases for Mutnovskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Mutnovskite

Pb2AsS3(I,Cl,Br)
Dana No: 02.15.07.01 Strunz No: 02.GC.50
Locality:

 

Notes:

 

 
   
 


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