Palladseite Mineral Data

Palladseite Mineral Data +

General Palladseite Information

Chemical Formula:

Pd17Se15

Composition:

Molecular Weight = 2,993.54 gm

Palladium 60.43 % Pd

Selenium 39.57 % Se

______

100.00 %

Empirical Formula:

Pd₁₇Se₁₅

Environment:

Residual concentrates from gold washings.

IMA Status:

Approved IMA 1977

Locality:

Itabira, Minas Gerais, Brazil Link to MinDat.org Location Data.

Name Origin:

Named for the composition, PALLADium and SElenium.

Synonym:

ICSD 23907

PDF 29-1437

Palladseite Image

Images:

Palladseite

Comments: Irregular metallic palladseite grain.
Location: Itabira, Minas Gerais, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Palladseite Crystallography

Cell Dimensions:

a = 10.606, Z = 2; V = 1,193.04 Den(Calc)= 8.33

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3m

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

By Intensity(I/I_o): 1.875(1), 3.198(1), 2.041(0.81),

Physical Properties of Palladseite

Color:

White.

Density:

8.3

Diaphaniety:

Opaque

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

4.5-5 - Near Apatite

Luster:

Metallic

Optical Properties of Palladseite

RL Color:

White in air, light gray in oil.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Palladseite in Air**
λ	R	∑ R(λ)
400 nm	42.40
420 nm	42.80
440 nm	43.30
460 nm	43.80
480 nm	44.30
500 nm	44.80
520 nm	45.40
540 nm	45.70
560 nm	45.80
580 nm	45.70
600 nm	45.60
620 nm	45.60
640 nm	45.60
660 nm	45.70
680 nm	45.80
700 nm	46.20

**Calculated Relative Intensity Colors of Palladseite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%
R

Calculated Properties of Palladseite

Electron Density:

r_electron=7.19 gm/cc
note: r_Palladseite=8.33 gm/cc.

Fermion Index

Fermion Index = 0.16502
Boson Index = 0.83498

Photoelectric:

PE_Palladseite= 178.67 barns/electron
U=PE_Palladseite x r_electron=1,284.71 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Palladseite is Not Radioactive

Palladseite Classification

Dana Class:

2.16.19.1 (2)Sulfides - Including Selenides and Tellurides

(2.16)with miscellaneous formulae

(2.16.19)Dana Group

2.16.19.1 Palladseite Pd17Se15 P m3m 4/m 3 2/m

2.16.19.2 Miassite! Rh17S15 P m3m 4/m 3 2/m

2.16.19.2a Prassoite! Rh17S15(?) P m3m 4/m 3 2/m

Strunz Class:

II/B.16-70 II - Sulfides and sulphosalts

II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Sulfides with predominant Nickel, Cobalt, Rhodium and Palladium

II/B.16 - Pentlandite group

II/B.16-10 Pentlandite (Fe,Ni)9S8 F m3m 4/m 3 2/m

II/B.16-20 Cobaltpentlandite Co9S8 F m3m 4/m 3 2/m

II/B.16-30 Argentopentlandite Ag(Fe,Ni)8S8 F m3m 4/m 3 2/m

II/B.16-40 Geffroyite (Ag,Cu,Fe)9(Se,S)8 F m3m 4/m 3 2/m

II/B.16-50 Manganese-shadlunite (Mn,Pb)(Cu,Fe)8S8 F m3m 4/m 3 2/m

II/B.16-60 Shadlunite (Pb,Cd)(Fe,Cu)8S8 F m3m 4/m 3 2/m

II/B.16-70 Palladseite Pd17Se15 P m3m 4/m 3 2/m

II/B.16-80 Miassite! Rh17S15 P m3m 4/m 3 2/m

II/B.16-80* Prassoite! Rh17S15(?) P m3m 4/m 3 2/m

Other Palladseite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Palladseite :
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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Palladseite

Pd17Se15
Dana No: 2.16.19.1 Strunz No: II/B.16-70
Locality:

Notes: