Mutnovskite Mineral Data

(Translated by https://www.hiragana.jp/)
Mutnovskite Mineral Data

General Mutnovskite Information

Chemical Formula:

Pb2AsS3(I,Cl,Br)

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 %

Empirical Formula:

Pb_1.99As_0.98Bi_0.02S_2.98Se_0.02I_0.47Cl_0.46Br_0.09

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

Mutnovskite Image

Images:

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

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Zelenski M , Balic-Zunic T , Bindi L , Garavelli A , Makovicky E , Pinto D , Vurro F , American Mineralogist , 91 (2006) p.21-28, First occurrence of iodine in natural sulfosalts: the case of mutnovskite, Pb2AsS3(I,Cl,Br),, a new mineral from Mutnovsky volcano, Kamchatka Peninsula, Russian Federation, Locality: Mutnovsky volcano, Kamchatka Peninsula, Russian Federation

Physical Properties of Mutnovskite

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

Optical Properties of Mutnovskite

Optical Data:

NCalc= 1.19 - from Gladstone-Dale relationship (KC = 0.0313) where Ncalc=Dcalc*KC+1

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	∑ 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

Electron Density:

Bulk Density (Electron Density)=5.18 gm/cc
note: Specific Gravity of Mutnovskite =6.17 gm/cc.

Fermion Index:

Fermion Index = 0.13
Boson Index = 0.87

Photoelectric:

PE_Mutnovskite=1,182.91 barns/electron
U=PE_Mutnovskite x rElectron Density=6,129.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mutnovskite is Not Radioactive

Mutnovskite Classification

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

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

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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Print or Cut-and-Paste your Mutnovskite Specimen Label here :

Mutnovskite

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

Notes: