Mozgovaite Mineral Data

Mozgovaite Mineral Data

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General Mozgovaite Information

Chemical Formula:

PbBi4(S,Se)7

Composition:

Molecular Weight = 1,279.31 gm

Bismuth 65.34 % Bi

Lead 16.20 % Pb

Selenium 1.54 % Se

Sulfur 16.92 % S

______

100.00 %

Empirical Formula:

PbBi₄S_6.75Se_0.25

Environment:

High-temperature (>600 deg C) fumarolic product.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

La Fossa crater, Isle Vulcano, Aeolian Islands, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for the Russian mineralogist Nadezhda N. Mozgova (1931-).

Synonym:

IMA1998-060

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Mozgovaite Crystallography

Axial Ratios:

a:b:c =0.3524:1:0.1082

Cell Dimensions:

a = 13.18, b = 37.4, c = 4.05, Z = 6; V = 1,996.37 Den(Calc)= 6.38

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Bbmm

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

By Intensity(I/I_o): 3.8(1)(280,121), 2.34(0.4)(0.16.0), 2.95(0.4)(321),3.58(0.3)(141), 3.3(0.3)(400), 3.4(0.2)(151), 3.11(0.2)(430), 1.917(0.2), 2.81(0.2)(191,470),

Physical Properties of Mozgovaite

Color:

Silver gray.

Diaphaniety:

Opaque

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

2.5-3.5 - Finger Nail-Copper Penny

Luster:

Metallic

Streak:

gray

Optical Properties of Mozgovaite

RL Anisotrophism:

Strong, without color effects.

RL Bireflectance:

Weak.

RL Color:

White.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Mozgovaite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
440 nm	40.10	36.00
460 nm	40.20	35.80
540 nm	40.60	35.30
560 nm	40.60	35.10
580 nm	40.60	35.00
600 nm	40.30	35.00
640 nm	40.10	34.80
660 nm	40.10	34.90

**Calculated Relative Intensity Colors of Mozgovaite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	260%
R₁
R₂

Calculated Properties of Mozgovaite

Electron Density:

r_electron=5.29 gm/cc
note: r_Mozgovaite=6.38 gm/cc.

Fermion Index

Fermion Index = 0.03823
Boson Index = 0.96177

Photoelectric:

PE_Mozgovaite=1,570.05 barns/electron
U=PE_Mozgovaite x r_electron=8,307.59 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Mozgovaite is Not Radioactive

Mozgovaite Classification

Dana Class:

3.3.3.2 (3)Sulfides - Sulfosalts

(3.3)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.3.3)Dana Group

3.3.3.1 Heyrovskyite Pb10AgBi5S18 C mcm 2/m 2/m 2/m

3.3.3.2 Mozgovaite ! PbBi4(S,Se)7 Bbmm 2/m 2/m 2/m

Strunz Class:

II/E.34-08 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts (Pb-Cu/Ag) with predominant Vismut x = 6.0 - 1.6

II/E.34 - Cosalite - Galenobismuthite

II/E.34-08 Mozgovaite PbBi4(S,Se)7 Bbmm 2/m 2/m 2/m

II/E.34-10 Cosalite Pb2Bi2S5 Pbnm 2/m 2/m 2/m

II/E.34-20 Proudite (Pb,Cu)8Bi9-10(S,Se)22 C 2/m 2/m

II/E.34-30 Weibullite Pb6Bi8(S,Se)18 P nma 2/m 2/m 2/m

II/E.34-60 Cannizzarite Pb4Bi6S13 C 2/m 2/m

II/E.34-65 Wittite Pb3Bi4(S,Se)9 P 2/m 2/m

II/E.34-70 Nordstromite Pb3CuBi7(S10Se4) P 2₁/m 2/m

II/E.34-80 Junoite Pb3Cu2Bi8(S,Se)16 C 2/m 2/m

II/E.34-85 Felbertalite! Cu2Pb6Bi8S19 C 2/m 2/m

II/E.34-90 Watkinsonite PbCu2Bi4(Se,S)8 Pm ? m

II/E.34-100 Paderaite AgPb2Cu6Bi11S22 P 2₁/m 2/m

II/E.34-110 Galenobismutite PbBi2S4 Pnam 2/m 2/m 2/m

Other Mozgovaite Information

References:

NAME( AmMin, Vol 85, p 1562) PHYS. PROP.(AmMin, Vol 85, p 1562) OPTIC PROP.(AmMin, Vol 85, p 1562)

See Also:

Links to other databases for Mozgovaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Mozgovaite

PbBi4(S,Se)7
Dana No: 3.3.3.2 Strunz No: II/E.34-08
Locality:

Notes: