Bohdanowiczite Mineral Data

General Bohdanowiczite Information

Chemical Formula:

AgBiSe2

Composition:

Molecular Weight = 474.77 gm

Silver 22.72 % Ag

Bismuth 44.02 % Bi

Selenium 33.26 % Se

______

100.00 %

Empirical Formula:

AgBiSe₂

Environment:

In fluorite and quartz in a strongly brecciated zone formed in crystalline limestone adjacent to magnetite-bearing skarns.

IMA Status:

Approved IMA 1967

Locality:

Kletna deposit, Sudetes Mountains, Poland Link to MinDat.org Location Data.

Name Origin:

Named for Karol Bohdanovicz (1864-1947), Polish economic geologist.

Name Pronunciation:

Bohdanowiczite + Pronunciation

Synonym:

ICSD 26519

PDF 29-1441

Bohdanowiczite Image

Images:

Bohdanowiczite

Comments: PPL polished section with Se-rich digenite (Se-dig) exsolved from massive bornite (Bn). Note the disseminated grains of bohdanowiczite (Bo) and naumannite surrounding the exsolved digenite.
Location: Kidd Creek Volcanogenic Massive Sulfide deposit, Western Abitibi Subprovince, Timmins, Ontario, Canada. Scale: Picture Size.
© National Resouces of Canada

Bohdanowiczite Crystallography

Axial Ratios:

a:c = 1:4.67311

Cell Dimensions:

a = 4.2049, c = 19.65, Z = 3; V = 300.89 Den(Calc)= 7.86

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1

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

By Intensity(I/I_o): 2.926(1), 2.036(0.8), 2.101(0.8),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Geller S , Wernick J H , Acta Crystallographica , 12 (1959) p.46-54, Ternary semiconducting compounds with sodium chloride-like structure: AgSbSe2,, AgSbTe2, AgBiS2, AgBiSe2, Locality: synthetic

Physical Properties of Bohdanowiczite

Color:

Lead gray.

Density:

7.87

Diaphaneity:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

3 - Calcite

Luster:

Metallic

Optical Properties of Bohdanowiczite

RL Anisotrophism:

Noticeable, distinctly stronger in oil, in yellowish gray tones.

RL Color:

Pale creamy yellow to pink.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Bohdanowiczite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	51.20	52.90
546 nm	49.80	51.50
589 nm	50.10	51.50
650 nm	50.10	51.60

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

Calculated Properties of Bohdanowiczite

Electron Density:

Bulk Density (Electron Density)=6.56 gm/cc
note: Specific Gravity of Bohdanowiczite =7.86 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Bohdanowiczite}= 939.32 barns/electron
U=PE_{Bohdanowiczite} x rElectron Density=6,158.14 barns/cc.

Radioactivity:

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

Bohdanowiczite Classification

Dana Class:

03.07.01.02 (03)Sulfides - Sulfosalts

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

(03.07.01)Matildite Group

03.07.01.01 Matildite AgBiS2 P 3m1 3 2/m

03.07.01.02 Bohdanowiczite AgBiSe2 P 3m1 3 2/m

03.07.01.03 Volynskite AgBiTe2 P 3m1 3 2/m

03.07.01.04 Zlatogorite! CuNiSb2 P 3m1 3 2/m

Strunz Class:

02.JA.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.J - Sulfosalts of PbS Archetype

02.JA -Galena derivatives with little or no Pb

02.JA.20 Bohdanowiczite AgBiSe2 P 3m1 3 2/m

02.JA.20 Matildite AgBiS2 P 3m1 3 2/m

02.JA.20 Volynskite AgBiTe2 P 3m1 3 2/m

Other Bohdanowiczite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

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

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

Bohdanowiczite

AgBiSe2
Dana No: 03.07.01.02 Strunz No: 02.JA.20
Locality:

Notes: