Arsenopalladinite Mineral Data

General Arsenopalladinite Information

Chemical Formula:

Pd8(As,Sb)3

Composition:

Molecular Weight = 1,099.54 gm

Antimony 5.54 % Sb

Arsenic 17.03 % As

Palladium 77.43 % Pd

______

100.00 %

Empirical Formula:

Pd₈As_2.5Sb_0.5

Environment:

Alluvial placers and ultra-basic intrusions.

IMA Status:

Approved IMA 1974

Locality:

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

Name Origin:

Named for its composition.

Name Pronunciation:

Arsenopalladinite + Pronunciation

Arsenopalladinite Image

Images:

Click Here for Larger Arsenopalladinite Image

Arsenopalladinite Isomertieite Gold Bornite

Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite. Polished section (from microprobe analysis) in reflected light.
Location: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia. Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Arsenopalladinite

Comments: Arsenopalladinite micro crystal.
Location: Itabira, Minas Gerais, Brazil. Scale: Not Given.
© Jeff Weissman / Photographic Guide to Mineral Species

Arsenopalladinite Crystallography

Axial Ratios:

a:b:c =0.5326:1:0.5268

Cell Dimensions:

a = 7.43, b = 13.95, c = 7.35, Z = 4; alpha = 92.88°, beta = 119.5°, gamma = 87.85° V = 661.75 Den(Calc)= 11.04

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 2.13(1), 2.34(0.6), 1.41(0.4),

Physical Properties of Arsenopalladinite

Color:

Silver white.

Density:

10.4

Diaphaneity:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Nuggets - Irregular lumps produced by stream transport of malleable metals.

Hardness:

4 - Fluorite

Luster:

Metallic

Optical Properties of Arsenopalladinite

RL Anisotrophism:

Strong, red and golden brown to blue-gray in air, khaki-brown to blue gray in oil.

RL Color:

White with yellowish creamy tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Arsenopalladinite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	43.90	44.50
420 nm	44.70	45.80
440 nm	45.70	46.50
460 nm	46.80	47.80
480 nm	48.10	49.40
500 nm	49.40	50.80
520 nm	50.80	52.40
540 nm	52.10	53.90
560 nm	53.20	55.10
580 nm	54.40	56.40
600 nm	55.40	57.30
620 nm	56.40	58.10
640 nm	57.00	58.80
660 nm	57.70	59.20
680 nm	58.20	59.80
700 nm	58.80	60.00

**Calculated Relative Intensity Colors of Arsenopalladinite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R₁
R₂

Calculated Properties of Arsenopalladinite

Electron Density:

Bulk Density (Electron Density)=9.55 gm/cc
note: Specific Gravity of Arsenopalladinite =11.0 gm/cc.

Fermion Index:

Fermion Index = 0.17
Boson Index = 0.83

Photoelectric:

PE_{Arsenopalladinite}= 218.60 barns/electron
U=PE_{Arsenopalladinite} x rElectron Density=2,087.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arsenopalladinite is Not Radioactive

Arsenopalladinite Classification

Dana Class:

02.16.05.01 (02)Sulfides - Including Selenides and Tellurides

(02.16)with miscellaneous formulae

(02.16.05)Dana Group

02.16.05.01 Arsenopalladinite Pd8(As,Sb)3 P1 1

Strunz Class:

02.AC.10c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.A - Simple Sulfides, Selenides, etc

02.AC -Alloys of metalloids with PGE

02.AC.10c Arsenopalladinite Pd8(As,Sb)3 P1 1

Other Arsenopalladinite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Arsenopalladinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Arsenopalladinite

Pd8(As,Sb)3
Dana No: 02.16.05.01 Strunz No: 02.AC.10c
Locality:

Notes: