Bohdanowiczite Mineral Data

Bohdanowiczite Mineral Data +

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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.

Synonym:

ICSD 26519

PDF 29-1441

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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),

Physical Properties of Bohdanowiczite

Color:

Lead gray.

Density:

7.87

Diaphaniety:

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:

r_electron=6.56 gm/cc
note: r_{Bohdanowiczite}=7.86 gm/cc.

Fermion Index

Fermion Index = 0.02527
Boson Index = 0.97473

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bohdanowiczite is Not Radioactive

Bohdanowiczite Classification

Dana Class:

3.7.1.2 (3)Sulfides - Sulfosalts

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

(3.7.1)Dana Group

3.7.1.1 Matildite AgBiS2 P 3m1 3 2/m

3.7.1.2 Bohdanowiczite AgBiSe2 P 3m1 3 2/m

3.7.1.3 Volynskite AgBiTe2 P 3m1 3 2/m

3.7.1.4 Zlatogorite! CuNiSb2 P 3m1 3 2/m

Strunz Class:

II/C.16-40 II - Sulfides and sulphosalts

II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1

II/C.16 - Miargyrite - Volynskite series

II/C.16-05 Cuboargyrite! AgSbS F m3m 4/m 3 2/m

II/C.16-10 Miargyrite AgSbS2 C 2/c 2/m

II/C.16-15 Baumstarkite! Ag3(Sb,As)2SbS6 P1 1

II/C.16-20 Aramayoite Ag3Sb2(Sb,Bi)S6 P1 1

II/C.16-30 Matildite AgBiS2 P 3m1 3 2/m

II/C.16-35 Schapbachite! AgBiS2 F m3m 4/m 3 2/m

II/C.16-40 Bohdanowiczite AgBiSe2 P 3m1 3 2/m

II/C.16-50 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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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

Bohdanowiczite

AgBiSe2
Dana No: 3.7.1.2 Strunz No: II/C.16-40
Locality:

Notes: