Tetradymite Mineral Data + Say TETRADYMITE

T G Fine Minerals
[Newest Minerals] [Rare Minerals] [Past Sale Items] [About Us] [A-Rocks Auctions]
T G Fine Minerals sells Australian Minerals from all the classic and current localities
We are one the most comprehensive sellers of these (Aussie) minerals in the world
Broken Hill specimens are our specialty along with fine worldwide minerals, Australian opals, fossils & gems

General Tetradymite Information
Help on Chemical Formula: Chemical Formula: Bi2Te2S
Help on Composition: Composition: Molecular Weight = 705.23 gm
   Bismuth    59.27 %  Bi
   Tellurium  36.19 %  Te
   Sulfur      4.55 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Bi2Te2S
Help on Environment: Environment: Found in hydrotherma quartz-gold veins o f moderate to high temperature and contact metamorphic deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1831
Help on Locality: Locality: Zupkov (Zsubkó, Schubkau), Stredoslovenský Kraj, Slovak Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, tetradymos, "fourfold."
Help on Synonym: Synonym: Csiklovaite
  ICSD 26720
  PDF 42-1447
 

Tetradymite Image

Click Here for Larger Tetradymite Image in a New Browser Window Images:
Click Here for Larger Tetradymite Image

Tetradymite

Comments: Gray metallic foliated tetradymite in quartz.
Location: Mangfallberg, Boliden, Vasterbotten, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tetradymite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:6.98166
Help on Cell Dimensions: Cell Dimensions: a = 4.2381, c = 29.589, Z = 3; V = 460.26 Den(Calc)= 7.63
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.292(1), 3.1(1), 2.111(0.75),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 0 1 2] [ 1 0 1] [ 0 0 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Tetradymite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Pauling L , American Mineralogist , 60 (1975) p.994-997, The formula, structure, and chemical bonding of tetradymite, Bi14Te13S8, and the, Phase Bi14Te15S6, cell parameters were computed from those provided in the rhombohedral setting

View Additional jPOWD Structure files for Tetradymite
[1]
 

Physical Properties of Tetradymite

Help on Cleavage: Cleavage: [0001] Perfect
Help on Color: Color: Steel gray, Yellow gray.
Help on Density: Density: 7.2 - 7.9, Average = 7.55
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: steel gray
 

Optical Properties of Tetradymite

Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Color: RL Color: White.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Tetradymite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   50.00   52.70 
   
 420 nm   50.80   53.60 
 440 nm   51.60   54.50 
 460 nm   52.00   55.00 
 480 nm   52.40   55.40 
 500 nm   52.70   55.80 
 520 nm   53.00   56.20 
 540 nm   53.20   56.40 
 560 nm   53.30   56.50 
 580 nm   53.40   56.60 
 600 nm   53.50   56.70 
 620 nm   53.50   56.80 
 640 nm   53.40   56.90 
 660 nm   53.40   57.00 
 680 nm   53.40   57.10 
 700 nm   53.50   57.20 
Calculated Relative Intensity Colors of Tetradymite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 170%
R1                    
R2                    
 

Calculated Properties of Tetradymite

Help on Electron Density: Electron Density:

relectron=6.19 gm/cc
note: rTetradymite =7.63 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02925
Boson Index = 0.97075
Help on Photoelectric: Photoelectric:

PETetradymite =1,313.02 barns/electron
U=PETetradymite x relectron=8,125.77 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tetradymite is Not Radioactive
 

Tetradymite Classification
Help on Dana Class: Dana Class: 2.11.7.1 (2)Sulfides - Including Selenides and Tellurides
  (2.11)where Am Bn Xp, with (m+n):p=2:3
  (2.11.7)Tetradymite Group (Trigonal: R-3m)
 
2.11.7.1 Tetradymite Bi2Te2S R 3m 3 2/m
 
2.11.7.2 Tellurobismuthite Bi2Te3 R 3m 3 2/m
 
2.11.7.3 Tellurantimony Sb2Te3 R 3m 3 2/m
 
2.11.7.4 Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m
 
2.11.7.5 Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m
 
2.11.7.6 Skippenite Bi2Se2(Te,S) R 3m 3 2/m
Help on Strunz Class: Strunz Class: II/D.09-60 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.09 - Tetradymite group, Tellurantimony - Kawazulite series
 
II/D.09-10 Tellurantimony Sb2Te3 R 3m 3 2/m
 
II/D.09-20 Tellurobismuthite Bi2Te3 R 3m 3 2/m
 
II/D.09-30 Paraguanajuatite Bi2(Se,S)3 R 3m 3 2/m
 
II/D.09-50 Skippenite Bi2Se2(Te,S) R 3m 3 2/m
 
II/D.09-60 Tetradymite Bi2Te2S R 3m 3 2/m
 
II/D.09-70 Kawazulite Bi2(Te,Se,S)3 R 3m 3 2/m
 

Other Tetradymite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Tetradymite :
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 - Scandinavian mineral gallery 14 - WWW-MINCRYST 15 -École des Mines de Paris

Search for Tetradymite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Tetradymite :

AA Mineral Specimens
B & L Fine Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
Heliodor
John Betts Fine Minerals
Mason's Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz
T G Fine Minerals
Wrights Rock Shop

Translate Tetradymite Mineral Data :

Ask about Tetradymite 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 Tetradymite Specimen Label here :

Tetradymite

Bi2Te2S
Dana No: 2.11.7.1 Strunz No: II/D.09-60
Locality:

 

Notes:

 
 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links