Palladoarsenide Mineral Data

General Palladoarsenide Information

Chemical Formula:

Pd2As

Composition:

Molecular Weight = 287.76 gm

Arsenic 26.04 % As

Palladium 73.96 % Pd

______

100.00 %

Empirical Formula:

Pd₂As

Environment:

Minute grains in chalcopyrite that occurs in viens along the footwall of a Cu-Ni deposit.

IMA Status:

Approved IMA 1974

Locality:

Oktyabr mine, Talnakh area, Noril'sk district, western Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the composition.

Name Pronunciation:

Palladoarsenide

Synonym:

ICSD 26279

PDF 17-227

Palladoarsenide Image

Images:

Palladoarsenide

Comments: SEM polished section showing hessite (Hes) with merenskyite (Mrk) relics surrounded by palladoarsenide (PdAs). (CanMin, v43:1355).
Location: Elatsite porphyry-copper deposit, Bulgaria. Scale: Scale Bar 10 µm.
© Canadian Mineralogist

Palladoarsenide Crystallography

Axial Ratios:

a:b:c =1.092:1:1.2325

Cell Dimensions:

a = 9.25, b = 8.47, c = 10.44, Z = 18; beta = 94° V = 815.96 Den(Calc)= 10.54

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/m

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

By Intensity(I/I_o): 2.14(1), 2.21(0.9), 2.6(0.7),

Physical Properties of Palladoarsenide

Cleavage:

{???} Good, {???} Good

Color:

Steel gray.

Density:

10.42

Diaphaneity:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Palladoarsenide

RL Anisotrophism:

Moderate, dark gray wiht bluish tint to red-brown in air, dark gray to brownish gray in oil.

RL Color:

Grayish white with a slight rose tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Palladoarsenide in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	44.20	45.10
420 nm	46.80	46.80
440 nm	48.40	48.80
460 nm	49.40	50.30
480 nm	50.20	51.60
500 nm	51.20	53.10
520 nm	51.90	54.10
540 nm	52.50	54.80
560 nm	53.30	55.40
580 nm	53.90	55.80
600 nm	54.60	56.30
620 nm	55.40	57.10
640 nm	56.00	57.60
660 nm	56.60	58.10
680 nm	57.10	58.60
700 nm	57.80	59.20

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

Calculated Properties of Palladoarsenide

Electron Density:

Bulk Density (Electron Density)=9.16 gm/cc
note: Specific Gravity of Palladoarsenide =10.5 gm/cc.

Fermion Index:

Fermion Index = 0.16
Boson Index = 0.84

Photoelectric:

PE_{Palladoarsenide}= 197.46 barns/electron
U=PE_{Palladoarsenide} x rElectron Density=1,808.14 barns/cc.

Radioactivity:

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

Palladoarsenide Classification

Dana Class:

02.04.14.01 (02)Sulfides - Including Selenides and Tellurides

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

(02.04.14)Dana Group

02.04.14.01 Palladoarsenide Pd2As P 2/m 2/m

Strunz Class:

02.AC.25a 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.25a Palladoarsenide Pd2As P 2/m 2/m

Other Palladoarsenide Information

References:

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

See Also:

Links to other databases for Palladoarsenide :
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

Search for Palladoarsenide using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Palladoarsenide :

A Bijoux Google Search for Palladoarsenide
Adam's Minerals Google Search for Palladoarsenide
Cape Minerals Google Search for Palladoarsenide
Dakota Matrix Minerals Google Search for Palladoarsenide
Excalibur Mineral Corp. Google Search for Palladoarsenide
Exceptional Minerals Google Search for Palladoarsenide
John Betts Fine Minerals Search for Palladoarsenide
McDougall Minerals Google Search for Palladoarsenide
Mineral News Website Link
Rock and Mineral Shows Google Search for Palladoarsenide
Weinrich Minerals, Inc. Google Search for Palladoarsenide

Ask about Palladoarsenide here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Palladoarsenide

Pd2As
Dana No: 02.04.14.01 Strunz No: 02.AC.25a
Locality:

Notes: