Urvantsevite Mineral Data

Urvantsevite Mineral Data +

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General Urvantsevite Information

Chemical Formula:

Pd(Bi,Pb)2

Composition:

Molecular Weight = 523.49 gm

Bismuth 59.88 % Bi

Palladium 20.33 % Pd

Lead 19.79 % Pb

______

100.00 %

Empirical Formula:

PdBi_1.5Pb_0.5

Environment:

High temperature ploymorph of froodite.

IMA Status:

Approved IMA 1976

Locality:

Majak mine, Talnakh, Norilsk, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Nikolai N. Urvantsev (1893-1985), Russian geologist who discovered the Norilsk deposits.

Synonym:

ICSD 56280

PDF 13-160

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Urvantsevite Crystallography

Axial Ratios:

a:c = 1:3.83668

Cell Dimensions:

a = 3.3628, c = 12.902, Z = 2; V = 145.90 Den(Calc)= 11.92

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm

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

By Intensity(I/I_o): 2.643(1), 2.372(0.8), 1.42(0.7),

Physical Properties of Urvantsevite

Cleavage:

[???] Perfect

Color:

Steel gray.

Density:

9.66

Diaphaniety:

Opaque

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Optical Properties of Urvantsevite

RL Anisotrophism:

Slight.

RL Color:

Grayish white.

RL Pleochroism:

Weak to none.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Urvantsevite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
440 nm	50.50	48.70
460 nm	54.90	53.20
480 nm	53.80	54.60
500 nm	53.30	54.10
520 nm	53.70	54.80
540 nm	54.00	55.20
560 nm	54.90	56.20
580 nm	55.20	56.70
600 nm	56.10	57.00
620 nm	56.80	58.30
640 nm	57.80	59.20
660 nm	58.60	60.10
680 nm	59.60	60.90
700 nm	59.60	61.30

**Calculated Relative Intensity Colors of Urvantsevite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	170%
R₁
R₂

Calculated Properties of Urvantsevite

Electron Density:

r_electron=9.63 gm/cc
note: r_Urvantsevite=11.9 gm/cc.

Fermion Index

Fermion Index = 0.08913
Boson Index = 0.91087

Photoelectric:

PE_Urvantsevite=1,621.16 barns/electron
U=PE_Urvantsevite x r_electron=15614.71 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Urvantsevite is Not Radioactive

Urvantsevite Classification

Dana Class:

2.12.15.2 (2)Sulfides - Including Selenides and Tellurides

(2.12)where Am Bn Xp, with (m+n):p=1:2

(2.12.15)Dana Group

2.12.15.1 Froodite PdBi2 C 2/m 2/m

2.12.15.2 Urvantsevite Pd(Bi,Pb)2 I 4/mmm 4/m 2/m 2/m

2.12.15.3 Verbeekite! PdSe2 C 2, Cm, or C 2/m Mono

Strunz Class:

II/D.21-20 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.21 - Borishanskiite -Urvantsevite series

II/D.21-05 Borishanskiite Pd1x(As,Pb)2,x=0-0.2 Ccm21 mm2

II/D.21-10 Froodite PdBi2 C 2/m 2/m

II/D.21-20 Urvantsevite Pd(Bi,Pb)2 I 4/mmm 4/m 2/m 2/m

Other Urvantsevite Information

References:

NAME( Dana8) PHYS. PROP.(Larousse des Mineraux,1981)

See Also:

Links to other databases for Urvantsevite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Urvantsevite

Pd(Bi,Pb)2
Dana No: 2.12.15.2 Strunz No: II/D.21-20
Locality:

Notes: