Telluronevskite Mineral Data

Telluronevskite Mineral Data

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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:

Bi_2.92Pb_0.02Te_1.01Se_1.73S_0.32

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

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

By Intensity(I/I_o): 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
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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:

r_electron=6.54 gm/cc
note: r_{Telluronevskite}=8.07 gm/cc.

Fermion Index

Fermion Index = 0.02434
Boson Index = 0.97566

Photoelectric:

PE_{Telluronevskite}=1,439.18 barns/electron
U=PE_{Telluronevskite} x r_electron=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

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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: