Cannizzarite Mineral Data

Cannizzarite Mineral Data

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General Cannizzarite Information

Chemical Formula:

Pb4Bi6S13

Composition:

Molecular Weight = 2,499.54 gm

Bismuth 50.16 % Bi

Lead 33.16 % Pb

Sulfur 16.68 % S

______

100.00 %

Empirical Formula:

Pb₄Bi₆S₁₃

Environment:

Associated with deep fumarolic activity.

IMA Status:

Valid Species (Pre-IMA) 1925

Locality:

From Vulcano, in the Lipari Islands, Italy. Link to MinDat.org Location Data.

Name Origin:

For Stanislao Cannizzaro (1826-1910), celebrated chemist, University of Rome, Italy.

Synonym:

ICSD 49716

PDF 9-357

Cannizzarite Image

Images:

Cannizzarite

Comments: Very delicate 2 mm. crystals of dark gray cannizzarite on matrix.
Location: Kudryaviy Volcano, Iturup Island, Kurilian Island Chain, Russia. Scale: 3.8x3x2.4 cm.
© Richard Dale / Dale Minerals

Cannizzarite Crystallography

Axial Ratios:

a:b:c =0.8428:1:3.1591

Cell Dimensions:

a = 4.13, b = 4.9, c = 15.48, Z = 0.5; beta = 98.56° V = 309.78 Den(Calc)= 6.70

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.82(1), 2.68(0.6), 3.01(0.6),

Physical Properties of Cannizzarite

Color:

Light gray, Silver gray.

Density:

6.7

Diaphaniety:

Opaque

Fracture:

Flexible - Flexible fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Felted - Occurs as minute crystalling aggregates with the form of felt material.

Habit:

Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Optical Properties of Cannizzarite

RL Anisotrophism:

Strong, from blue to gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Cannizzarite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	49.20	51.30
420 nm	49.80	52.40
440 nm	50.40	53.50
460 nm	50.70	53.70
480 nm	50.60	53.30
500 nm	50.20	52.80
520 nm	49.70	52.20
540 nm	49.20	51.60
560 nm	48.60	51.00
580 nm	48.20	50.40
600 nm	47.80	50.00
620 nm	47.50	49.50
640 nm	47.30	49.20
660 nm	47.20	49.00
680 nm	47.20	49.00
700 nm	47.20	49.20

**Calculated Relative Intensity Colors of Cannizzarite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R₁
R₂

Calculated Properties of Cannizzarite

Electron Density:

r_electron=5.54 gm/cc
note: r_Cannizzarite=6.70 gm/cc.

Fermion Index

Fermion Index = 0.07453
Boson Index = 0.92547

Photoelectric:

PE_Cannizzarite=1,592.03 barns/electron
U=PE_Cannizzarite x r_electron=8,825.02 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Cannizzarite is Not Radioactive

Cannizzarite Classification

Dana Class:

3.6.5.1 (3)Sulfides - Sulfosalts

(3.6)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.6.5)Dana Group

3.6.5.1 Cannizzarite Pb4Bi6S13 C 2/m 2/m

3.6.5.2 Wittite Pb3Bi4(S,Se)9 P 2/m 2/m

Strunz Class:

II/E.34-60 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 Cannizzarite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(AntBidBlaNic1) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Cannizzarite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Cannizzarite

Pb4Bi6S13
Dana No: 3.6.5.1 Strunz No: II/E.34-60
Locality:

Notes: