Mineralogy Database

Palladoarsenide Mineral Data

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General Palladoarsenide Information

Help on Chemical  Formula: Chemical Formula: Pd2As
Help on Composition: Composition: Molecular Weight = 287.76 gm
   Arsenic    26.04 %  As
   Palladium  73.96 %  Pd
             100.00 % 
Help on Empirical Formula: Empirical Formula: Pd2As
Help on Environment: Environment: Minute grains in chalcopyrite that occurs in viens along the footwall of a Cu-Ni deposit.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Oktyabr mine, Talnakh area, Noril'sk district, western Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Palladoarsenide Say PALLADOARSENIDE
Help on Synonym: Synonym: ICSD 26279
  PDF 17-227

Palladoarsenide Image

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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

Help on Axial Ratios: Axial Ratios: a:b:c =1.092:1:1.2325
Help on Cell Dimensions: Cell Dimensions: a = 9.25, b = 8.47, c = 10.44, Z = 18; beta = 94° V = 815.96 Den(Calc)= 10.54
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.14(1), 2.21(0.9), 2.6(0.7),

Physical Properties of Palladoarsenide

Help on Cleavage: Cleavage: {???} Good, {???} Good
Help on Color: Color: Steel gray.
Help on Density: Density: 10.42
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Metallic

Optical Properties of Palladoarsenide

Help on RL Anisotrophism: RL Anisotrophism: Moderate, dark gray wiht bluish tint to red-brown in air, dark gray to brownish gray in oil.
Help on RL Color: RL Color: Grayish white with a slight rose tint.
Help on Reflectivity 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
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180% 190%

Calculated Properties of Palladoarsenide

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=9.16 gm/cc
note: Specific Gravity of Palladoarsenide =10.5 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.16
Boson Index = 0.84
Help on Photoelectric: Photoelectric: PEPalladoarsenide = 197.46 barns/electron
U=PEPalladoarsenide x rElectron Density=1,808.14 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Palladoarsenide is Not Radioactive

Palladoarsenide Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.04)where Am Bn Xp, with (m+n):p=2:1
  (02.04.14)Dana Group Palladoarsenide Pd2As P 2/m 2/m
Help on  Strunz Class: 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

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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

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Dana No: Strunz No: 02.AC.25a





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