Vihorlatite Mineral Data

General Vihorlatite Information

Chemical Formula:

Bi24Se17Te4

Composition:

Molecular Weight = 6,525.04 gm

Bismuth 70.14 % Bi

Tellurium 8.02 % Te

Selenium 21.06 % Se

Sulfur 0.79 % S

______

100.00 %

Empirical Formula:

Bi_21.9Se_17.4Te_4.1S_1.6

Environment:

Occurs in quartz-opal veinlets or secondary quartzites as anhedral grains. Tetradymite group.

IMA Status:

Approved IMA 1988 (Dana # Added)

Locality:

Poruba, Vihorlat Mountains, Slovakia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

IMA1988-047

Vihorlatite Image

Images:

Vihorlatite

Comments: Dark gray sub-metallic platy vihorlatite in fine grained matrix.
Location: Poruba, Vohorlat Mountains, Vychodoslovensky, Slovakia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Vihorlatite Crystallography

Axial Ratios:

a:c = 1:20.33086

Cell Dimensions:

a = 4.2797, c = 87.01, Z = 1; V = 1,380.15 Den(Calc)= 7.85

Crystal System:

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

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

By Intensity(I/I_o): 3.116(1)(1.0.15), 2.282(0.755)(0.1.30), 4.55(0.554)(0.0.19),1.934(0.428)(1.1.19), 1.767(0.315)(0.2.15),

Physical Properties of Vihorlatite

Color:

Gray.

Density:

Diaphaneity:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Triangular Crystals - Occurs as triangular shaped crystals.

Luster:

Metallic

Calculated Properties of Vihorlatite

Electron Density:

Bulk Density (Electron Density)=6.37 gm/cc
note: Specific Gravity of Vihorlatite =7.85 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Vihorlatite=1,439.18 barns/electron
U=PE_Vihorlatite x rElectron Density=9,169.95 barns/cc.

Radioactivity:

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

Vihorlatite Classification

Dana Class:

02.11.07.07 (02)Sulfides - Including Selenides and Tellurides

(02.11)where Am Bn Xp, with (m+n):p=2:3

(02.11.07)Tetradymite Group (Trigonal: R-3m)

02.11.07.01 Tetradymite Bi2Te2S R 3m 3 2/m

02.11.07.02 Tellurobismuthite Bi2Te3 R 3m 3 2/m

02.11.07.03 Tellurantimony Sb2Te3 R 3m 3 2/m

02.11.07.04 Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m

02.11.07.05 Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m

02.11.07.06 Skippenite Bi2Se2(Te,S) R 3m 3 2/m

02.11.07.07 Vihorlatite! Bi24Se17Te4 P 3m1 3 2/m

Strunz Class:

02.DC.05e 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.D - Metal Sulfides, M:S = 3:4 and 2:3

02.DC -Variable M:S

02.DC.05e Baksanite! Bi6Te2S3 P 3m1 3 2/m

02.DC.05e Sztrokayite* Bi3TeS2 Trig ? Trig

02.DC.05e Protojoseite* Bi4TeS2(?) R 3m 3 2/m

02.DC.05e Vihorlatite! Bi24Se17Te4 P 3m1 3 2/m

Other Vihorlatite Information

References:

NAME( AmMin, v93:254) PHYS. PROP.(AmMin, v93:254)

See Also:

Links to other databases for Vihorlatite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Vihorlatite

Bi24Se17Te4
Dana No: 02.11.07.07 Strunz No: 02.DC.05e
Locality:

Notes:

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