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Mutnovskite Mineral Data
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General Mutnovskite Information
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 Chemical Formula: |
Pb2AsS3(I,Cl,Br) |
| Composition: |
Molecular Weight = 670.21 gm |
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Bismuth 0.62 % Bi |
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Arsenic 10.96 % As |
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Lead 61.52 % Pb |
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Selenium 0.24 % Se |
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Sulfur 14.26 % S |
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Iodine 8.90 % I |
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Bromine 1.07 % Br |
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Chlorine 2.43 % Cl |
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______ |
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100.00 % |
| Empirical Formula: |
Pb1.99As0.98Bi0.02S2.98Se0.02I0.47Cl0.46Br0.09 |
| Environment: |
Volcanic sublimates (250 deg C) in fumaroles. |
| IMA Status: |
Approved IMA 2004 (Dana # Added) |
| Locality: |
Mutnovsky volcano, Kamchatka Peninsula, Russia Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA2004-032 |
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Mutnovskite Image |
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Images:
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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 |
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Mutnovskite Crystallography
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| Axial Ratios: |
a:b:c =1.7289:1:1.4018 |
| Cell Dimensions: |
a = 11.543, b = 6.6764, c = 9.359, Z = 4; V = 721.26 Den(Calc)= 6.17 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma |
| 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), |
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Physical Properties of Mutnovskite
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| Cleavage: |
Unknown, Unknown, Unknown |
| Color: |
Ruby red, Brownish red. |
| Diaphaneity: |
Translucent to subtranslucent |
| Fracture: |
Unknown - Minerals too small to observe fractures. |
| Habit: |
Blocky - Crystal shape tends to be equant (e.g. feldspars). |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Hardness: |
2 - Gypsum |
| Luster: |
Subadamantine |
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Optical Properties of Mutnovskite
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| Optical Data: |
NCalc= 1.19 - from Gladstone-Dale relationship (KC = 0.0313) where Ncalc=Dcalc*KC+1
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| RL Anisotrophism: |
Not visible because of orange internal reflections. |
| RL Color: |
Silvery lead gray with strong orange internal reflections. |
| RL Pleochroism: |
Not visible because of orange internal reflections. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Mutnovskite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
39.20 |
44.10 |
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| 420 nm |
38.60 |
39.40 |
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| 440 nm |
36.50 |
37.60 |
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| 460 nm |
35.30 |
36.20 |
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| 470 nm |
34.20 |
34.60 |
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| 480 nm |
33.90 |
34.20 |
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| 500 nm |
33.70 |
34.00 |
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| 520 nm |
33.60 |
33.80 |
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| 540 nm |
33.40 |
33.60 |
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| 546 nm |
33.20 |
33.50 |
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| 560 nm |
32.90 |
33.10 |
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| 580 nm |
32.70 |
32.80 |
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| 589 nm |
32.50 |
32.70 |
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| 600 nm |
32.20 |
32.50 |
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| 620 nm |
31.90 |
32.10 |
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| 640 nm |
31.70 |
31.90 |
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| 650 nm |
31.40 |
31.70 |
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| 660 nm |
31.20 |
31.40 |
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| 680 nm |
30.90 |
31.00 |
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| 700 nm |
30.70 |
30.80 |
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Calculated Relative Intensity Colors of Mutnovskite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
270% |
| R1 |
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| R2 |
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Calculated Properties of Mutnovskite
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| Electron Density: |
Bulk Density (Electron Density)=5.18 gm/cc
note: Specific Gravity of Mutnovskite =6.17 gm/cc.
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| Fermion Index: |
Fermion Index = 0.13
Boson Index = 0.87 |
| Photoelectric: |
PEMutnovskite =1,182.91 barns/electron
U=PEMutnovskite x rElectron Density=6,129.28 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mutnovskite is Not Radioactive |
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Mutnovskite Classification
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| Dana Class: |
02.15.07.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.15)(Chlorides) |
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(02.15.07)Dana Group |
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02.15.07.01 Mutnovskite! Pb2AsS3(I,Cl,Br) P nma 2/m 2/m 2/m |
| Strunz Class: |
02.GC.50 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.G - Sulfarsenites, sulfantimonites, sulfbismuthites |
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02.GC -Poly-sulfarsenites |
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02.GC.50 Mutnovskite! Pb2AsS3(I,Cl,Br) P nma 2/m 2/m 2/m |
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Other Mutnovskite Information
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| References: |
NAME( AmMin, v91, p21) PHYS. PROP.(AmMin, v91, p21) OPTIC PROP.(AmMin, v91, p21) |
| 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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