| |
 |
Tellurobismuthite Mineral Data
|
|
|
General Tellurobismuthite Information
|
 Chemical Formula: |
Bi2Te3 |
| Composition: |
Molecular Weight = 800.76 gm |
| |
Bismuth 52.20 % Bi |
| |
Tellurium 47.80 % Te |
| |
______ |
| |
100.00 % |
| Empirical Formula: |
Bi2Te3 |
| Environment: |
Gold and tellurium-bearing deposits. |
| IMA Status: |
Valid Species (Pre-IMA) 1863 |
| Locality: |
Little Madrid Mine, Sylvanite district, Hidalgo County, New Mexico. Link to MinDat.org Location Data. |
| Name Origin: |
Named after its composition of tellurium and bismuth. |
| Name Pronunciation: |
Tellurobismuthite + Pronunciation  |
| Synonym: |
ICSD 74348 |
| |
PDF 15-863 |
| |
Tellurobismuthite Image |
|
Images:
|
|
|
Images:
|
|
Tellurobismuthite Crystallography
|
| Axial Ratios: |
a:c = 1:6.94628 |
| Cell Dimensions: |
a = 4.375, c = 30.39, Z = 3; V = 503.75 Den(Calc)= 7.92 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.222(1), 2.192(0.25), 2.376(0.25), |
| |
Physical Properties of Tellurobismuthite
|
| Cleavage: |
{0001} Perfect |
| Color: |
Pale gray. |
| Density: |
7.815 |
| Diaphaneity: |
Opaque |
| Fracture: |
Flexible - Flexible fragments. |
| Habit: |
Massive - Fibrous - Distinctly fibrous fine-grained forms. |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Hardness: |
1.5-2 - Talc-Gypsum |
| Luster: |
Metallic |
| Streak: |
lead gray |
| |
Optical Properties of Tellurobismuthite
|
| RL Anisotrophism: |
Weak. |
| RL Color: |
White. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Tellurobismuthite in Air
| λ |
R1 |
R2 |
 |
∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
58.60 |
61.30 |
|
|
|
| 420 nm |
59.00 |
61.40 |
|
| 440 nm |
59.40 |
61.50 |
|
| 460 nm |
59.60 |
61.50 |
|
| 480 nm |
59.60 |
61.40 |
|
| 500 nm |
59.50 |
61.50 |
|
| 520 nm |
59.50 |
61.70 |
|
| 540 nm |
59.60 |
62.00 |
|
| 560 nm |
60.00 |
62.60 |
|
| 580 nm |
60.30 |
63.20 |
|
| 600 nm |
60.80 |
63.80 |
|
| 620 nm |
61.40 |
64.30 |
|
| 640 nm |
62.00 |
64.80 |
|
| 660 nm |
62.50 |
65.20 |
|
| 680 nm |
63.00 |
65.50 |
|
| 700 nm |
63.40 |
65.80 |
|
Calculated Relative Intensity Colors of Tellurobismuthite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
150% |
| R1 |
|
|
|
|
|
|
|
|
|
| R2 |
|
|
|
|
|
|
|
|
|
|
| |
Calculated Properties of Tellurobismuthite
|
| Electron Density: |
Bulk Density (Electron Density)=6.37 gm/cc
note: Specific Gravity of Tellurobismuthite =7.92 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PETellurobismuthite =1,226.73 barns/electron
U=PETellurobismuthite x rElectron Density=7,813.71 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tellurobismuthite is Not Radioactive |
| |
Tellurobismuthite Classification
|
| Dana Class: |
02.11.07.02 (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.05c 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.05c Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m |
| |
02.DC.05c Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m |
| |
02.DC.05c Skippenite Bi2Se2(Te,S) R 3m 3 2/m |
| |
02.DC.05c Tetradymite Bi2Te2S R 3m 3 2/m |
| |
02.DC.05c Tellurantimony Sb2Te3 R 3m 3 2/m |
| |
02.DC.05c Tellurobismuthite Bi2Te3 R 3m 3 2/m |
| |
Other Tellurobismuthite Information
|
| References: |
NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Tellurobismuthite :
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
15 - WWW-MINCRYST
Search for Tellurobismuthite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Tellurobismuthite :
Ask about Tellurobismuthite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Español
Print or Cut-and-Paste your Tellurobismuthite Specimen Label here :
|
Tellurobismuthite
Bi2Te3
Dana No: 02.11.07.02 Strunz No: 02.DC.05c
Locality:
Notes:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.
