Telluronevskite Mineral Data

T G Fine Minerals

General Telluronevskite Information
Chemical Formula:	Bi3TeSe2
Composition:	Molecular Weight = 890.10 gm
	Bismuth    68.56 %  Bi
	Tellurium  14.48 %  Te
	Lead        0.47 %  Pb
	Selenium   15.35 %  Se
	Sulfur      1.15 %  S
	______
	100.00 %
Empirical Formula:	Bi2.92Pb0.02Te1.01Se1.73S0.32
Environment:	Found in opal-quartz veinlets in "secondary quartzite" formed by contact metamorphism or hydrothermal alteration of volcanic rocks.
IMA Status:	Approved IMA 2001
Locality:	Bihorlat Mountains near Kosice in eastern Slovakia, Slovak Republic. Link to MinDat.org Location Data.
Name Origin:	Named as the Te analog of nevskite.
Synonym:	IMA1993-027a
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Telluronevskite Crystallography
Axial Ratios:	a:c = 1:5.45262
Cell Dimensions:	a = 4.264, c = 23.25, Z = 2; V = 366.09 Den(Calc)= 8.07
Crystal System:	Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1
X Ray Diffraction:	By Intensity(I/Io): 3.12(1)(104), 2.28(0.33)(108), 4.66(0.19)(005),1.355(0.18)(1.0.16), 1.935(0.16)(115,0.0.12),
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	Ridkosil T , Skala R , Johan Z , Srein V , European Journal of Mineralogy , 13 (2001) p.177-185, Telluronevskite, Bi3TeSe2, a new mineral
Physical Properties of Telluronevskite
Cleavage:	[001] Perfect
Color:	Steel gray.
Density:	8.1
Diaphaniety:	Opaque
Fracture:	Brittle - Sectile - Brittle fracture with slightly sectile shavings possible.
Habit:	Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Habit:	Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:	Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Hardness:	3.5 - Copper Penny
Luster:	Metallic
Streak:	black
Optical Properties of Telluronevskite
Optical Data:	NCalc= 2.24 - from Gladstone-Dale relationship (KC = 0.154) where Ncalc=Dcalc*KC+1 NCalc= 2.25 - from Gladstone-Dale relationship (KC = 0.154) where Ncalc=Dmeas*KC+1
RL Anisotrophism:	Moderate without any strong chromatic effects.
RL Bireflectance:	Weak, noticeable in oil (yellowish white to gray).
RL Color:	White with a yellow tint with no internal reflections were observed.
RL Pleochroism:	Gray to bluish gray.
Reflectivity	Standardized Intensity (100%) Reflection Spectra of Telluronevskite in Air λ R1 R2  ∑ R1(λ)   ∑ R2(λ)   420 nm   45.50   42.50       440 nm   46.70   44.70   460 nm   47.80   45.90   470 nm   48.50   46.60   480 nm   49.20   46.90   500 nm   50.40   48.10   520 nm   50.50   48.50   540 nm   51.00   48.40   546 nm   51.10   48.50   560 nm   51.60   49.40   589 nm   51.90   49.40   600 nm   52.00   49.70   620 nm   52.60   50.20   640 nm   52.70   50.40   650 nm   52.80   50.50   660 nm   52.90   50.50   680 nm   53.10   50.60   700 nm   53.20   50.80  Calculated Relative Intensity Colors of Telluronevskite in Air Relative Intensity    0%   30%   60%   90% 100% 120% 150% 180% 200% R1                   R2
Calculated Properties of Telluronevskite
Electron Density:	relectron=6.54 gm/cc note: rTelluronevskite =8.07 gm/cc.
Fermion Index	Fermion Index = 0.02434 Boson Index = 0.97566
Photoelectric:	PETelluronevskite =1,439.18 barns/electron U=PETelluronevskite x relectron=9,406.66 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Telluronevskite is Not Radioactive
Telluronevskite Classification
Dana Class:	2.8.20.5 (2)Sulfides - Including Selenides and Tellurides
	(2.8)where Am Bn Xp, with (m+n):p=1:1
	(2.8.20)Tsumoite Group (Trigonal: P3¯m1)
	2.8.20.1 Tsumoite BiTe P 3m1 3 2/m
	2.8.20.2 Sulphotsumoite Bi3Te2S P 3m1 3 2/m
	2.8.20.3 Nevskite Bi(Se,S) P 3m1 3 2/m
	2.8.20.4 Ingodite Bi(S,Te) P 3m1 3 2/m
	2.8.20.5 Telluronevskite Bi3TeSe2 P 3m1 3 2/m
Strunz Class:	II/D.10-55 II - Sulfides and sulphosalts
	II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
	II/D.10 - Tetradymite group, Nevskite - Tsumoite series
	II/D.10-10 Nevskite Bi(Se,S) P 3m1 3 2/m
	II/D.10-30 Ingodite Bi(S,Te) P 3m1 3 2/m
	II/D.10-35 Sztrokayite* Bi3TeS2 Trig ? Trig
	II/D.10-40 Sulphotsumoite Bi3Te2S P 3m1 3 2/m
	II/D.10-50 Tsumoite BiTe P 3m1 3 2/m
	II/D.10-55 Telluronevskite Bi3TeSe2 P 3m1 3 2/m
	II/D.10-60 Protojoseite* Bi4TeS2(?) R 3m 3 2/m
	II/D.10-70 Baksanite! Bi6Te2S3 P 3m1 3 2/m
Other Telluronevskite Information
References:	NAME( AmMin, Vol 86, p 1537) PHYS. PROP.(AmMin, Vol 86, p 1537) OPTIC PROP.(EurJMin, Vol 13, p 177)
See Also:	Links to other databases for Telluronevskite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas Search for Telluronevskite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Telluronevskite : 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 Telluronevskite Mineral Data : Ask about Telluronevskite 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 Telluronevskite Specimen Label here : Telluronevskite Bi3TeSe2 Dana No: 2.8.20.5 Strunz No: II/D.10-55 Locality:   Notes: