Mineral Information and Data:

Arsenopalladinite
Pd8As3 [CNMNC approved formula]

Named for its composition.

IMA status : Redefined IMA Approved; 1977 ()
CLASSIFICATION 
Dana
(8th edition) :
02.16.05.01  
  (02) Sulfides - Including Selenides and Tellurides
  (02.16) with miscellaneous formulae
  (02.16.05)
  
Nickel-Strunz
(10th edition) :
02.AC.10c
  (02) Sulfides
  (02.A) Simple Sulfides, Selenides, etc
  (02.AC) Alloys of metalloids with PGE
  
Crystal system: Triclinic System
Point group (H-M): 1 — pedial
Unit cell: a = 7.43Å, b = 13.95Å, c = 7.35Å α = 92.88°, β = 119.5°, γ = 87.85°
Crystal Habit: As rounded grains, to 1.8 mm.
  
Color: White, with yellowish creamy tint, in polished section
Diaphaneity: Opaque
Luster: Metallic
Measured Density: 10.4 g/cm3
Tenacity: Malleable
  
Geologic Setting: In gold concentrates.
Mineral Association: Hematite, palladian gold, atheneite, stillwaterite, palladseite, isomertieite, quartz (Itabira district, Brazil); gpold, palladium, palladesite (Cauˆe mine, Brazil); stillwaterite, braggite, vysotaskite, sperrylite, hollingworthite (Siikakama intrusion, Finland).
  

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