Verbeekite Mineral Data

Verbeekite Mineral Data

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General Verbeekite Information

Chemical Formula:

PdSe2

Composition:

Molecular Weight = 264.34 gm

Palladium 40.26 % Pd

Selenium 59.74 % Se

______

100.00 %

Empirical Formula:

PdSe₂

Environment:

Se-rich sulfide lens. Replaced by oosterboschite.

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Musonoi mine, near Kolwezi, Shaba Province, Democratic Republic of Congo (formerly Zaire). Link to MinDat.org Location Data.

Name Origin:

Named for Theodore Verbeek (1927-1991) who did the original studies on the Se-bearing lens.

Synonym:

IMA2001-005

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Verbeekite Crystallography

Axial Ratios:

a:b:c =1.6122:1:1.0753

Cell Dimensions:

a = 6.657, b = 4.129, c = 4.44, Z = 2; beta = 92.83° V = 121.89 Den(Calc)= 7.20

Crystal System:

MonoclinicSpace Group: C 2, Cm, or C 2/m

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

By Intensity(I/I_o): 2.718(1)(111), 1.896(0.5)(112), 1.955(0.5)(310),3.496(0.3)(110), 4.423(0.3)(001), 1.815(0.2), 2.063(0.2),

Physical Properties of Verbeekite

Color:

Black.

Diaphaniety:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

5.5 - Knife Blade

Luster:

Metallic

Streak:

black

Optical Properties of Verbeekite

RL Anisotrophism:

Moderate with brown rotation tints.

RL Bireflectance:

Negligible.

RL Color:

Gray.

RL Pleochroism:

None.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Verbeekite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	50.80	52.30
546 nm	51.85	52.90
589 nm	52.20	53.55
650 nm	52.40	54.00

**Standardized Intensity (100%) Reflection Spectra of Verbeekite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
470 nm	37.00	38.40
546 nm	37.75	38.30
589 nm	38.50	38.60
650 nm	38.80	39.60

**Calculated Relative Intensity Colors of Verbeekite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%
R₁
R₂

**Calculated Relative Intensity Colors of Verbeekite in Oil**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%
R₁
R₂

Calculated Properties of Verbeekite

Electron Density:

r_electron=6.21 gm/cc
note: r_Verbeekite=7.20 gm/cc.

Fermion Index

Fermion Index = 0.1353
Boson Index = 0.8647

Photoelectric:

PE_Verbeekite= 146.29 barns/electron
U=PE_Verbeekite x r_electron= 908.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Verbeekite is Not Radioactive

Verbeekite Classification

Dana Class:

2.12.15.3 (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.28-60 II - Sulfides and sulphosalts

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

II/D.28 - Melonite group, Berntdtite - Moncheite series

II/D.28-10 Berndtite SnS2 P 3m1 3 2/m

II/D.28-20 Kitkaite NiTeSe P 3m1 3 2/m

II/D.28-30 Melonite NiTe2 P 3m1 3 2/m

II/D.28-35 Sudovikovite! PtSe2 P 3m1 3 2/m

II/D.28-40 Merenskyite (Pd,Pt)(Te,Bi)2 P 3m1 3m

II/D.28-45 Shuangfengite IrTe2 P 3m1 3 2/m

II/D.28-50 Moncheite (Pt,Pd)(Te,Bi)2 P 3m1 3 2/m

II/D.28-60 Verbeekite PdSe2 C 2, Cm, or C 2/m Mono

Other Verbeekite Information

References:

NAME( AmMin, Vol 88, p 253) PHYS. PROP.(AmMin, Vol 88, p 253) OPTIC PROP.(AmMin, Vol 88, p 253)

See Also:

Links to other databases for Verbeekite :
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 Verbeekite Specimen Label here :

Verbeekite

PdSe2
Dana No: 2.12.15.3 Strunz No: II/D.28-60
Locality:

Notes: