Galenobismutite Mineral Data

General Galenobismutite Information

Chemical Formula:

PbBi2S4

Composition:

Molecular Weight = 753.42 gm

Bismuth 55.47 % Bi

Lead 27.50 % Pb

Sulfur 17.02 % S

______

100.00 %

Empirical Formula:

PbBi₂S₄

Environment:

Hydrothermal origin

IMA Status:

Valid Species (Pre-IMA) 1878

Locality:

Ko mine, Nordmark, V�rmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named after its chemical composition.

Name Pronunciation:

Galenobismutite + Pronunciation

Synonym:

Bonchevite - mixture of pekoite and galenobismutite

Csiklovaite

ICSD 23905

PDF 20-571

Galenobismutite Image

Images:

Galenobismutite

Comments: Black metallic massive galenobismutite in translucent quartz.
Location: Vastervik, Smaland, Kalmar, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Galenobismutite Crystallography

Axial Ratios:

a:b:c =0.804:1:0.2815

Cell Dimensions:

a = 11.65, b = 14.49, c = 4.08, Z = 4; V = 688.74 Den(Calc)= 7.27

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnam

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

By Intensity(I/I_o): 3.45(1), 1.961(0.5), 3.03(0.4),

Forms:

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Forms: ( 2 1 1) ( 0 1 0) ( 1 1 1) ( 0 1 1) ( 8 1 0) ( 2 0 1) ( 1 0 0) ( 1 1 0)

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Physical Properties of Galenobismutite

Cleavage:

{110} Good

Color:

Lead gray, Gray, Light gray, Tin white.

Density:

6.9 - 7.1, Average = 7

Diaphaneity:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Columnar - Forms columns

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

2.5-3 - Finger Nail-Calcite

Luminescence:

Non-fluorescent.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

gray black

Optical Properties of Galenobismutite

RL Anisotrophism:

Strong.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Galenobismutite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	48.00	51.10
420 nm	47.90	51.10
440 nm	47.80	51.10
460 nm	47.70	51.00
480 nm	47.50	50.80
500 nm	47.10	50.50
520 nm	46.60	49.80
540 nm	45.90	48.80
560 nm	45.30	48.20
580 nm	44.80	47.70
600 nm	44.60	47.20
620 nm	44.40	46.80
640 nm	44.40	46.70
660 nm	44.40	46.70
680 nm	44.50	46.80
700 nm	44.70	47.10

**Calculated Relative Intensity Colors of Galenobismutite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	200%
R₁
R₂

Calculated Properties of Galenobismutite

Electron Density:

Bulk Density (Electron Density)=6.02 gm/cc
note: Specific Gravity of Galenobismutite =7.27 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_{Galenobismutite}=1,588.72 barns/electron
U=PE_{Galenobismutite} x rElectron Density=9,565.89 barns/cc.

Radioactivity:

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

Galenobismutite Classification

Dana Class:

03.07.09.01 (03)Sulfides - Sulfosalts

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

(03.07.09)Galenobismutite Group

03.07.09.01 Galenobismutite PbBi2S4 Pnam 2/m 2/m 2/m

03.07.09.02 Sakharovaite? (Pb,Fe)(Bi,Sb)2S4 Mono

03.07.09.03 Berthierite FeSb2S4 Pnam 2/m 2/m 2/m

03.07.09.04 Garavellite FeSbBiS4 Pnam 2/m 2/m 2/m

03.07.09.05 Clerite! MnSb2S4 Pnam 2/m 2/m 2/m

Strunz Class:

02.JB.45 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.J - Sulfosalts of PbS Archetype

02.JB -Galena derivatives, with Pb

02.JB.45 Galenobismutite PbBi2S4 Pnam 2/m 2/m 2/m

02.JB.45 Weibullite Pb6Bi8(S,Se)18 P nma 2/m 2/m 2/m

02.JB.45 Angelaite! Cu2AgPbBiS4 P 2₁/n 2/m

Other Galenobismutite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Galenobismutite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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

Galenobismutite

PbBi2S4
Dana No: 03.07.09.01 Strunz No: 02.JB.45
Locality:

Notes:

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