Arsenopalladinite

Formula: Pd8(As,Sb)3

Reflected/transmitted colour: opaque, polished section white with yellowish tint

Pleochroism:

Optical isotropy/anisotropy: strong, red and golden brown to blue-gray in air, khaki-brown to blue-gray and bright steel-gray in oil

Optical sign:

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2V angle:

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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.
Origin: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia
Picture size: 0.1 mm
Owner: Thomas Witzke
 

Photo courtesy of: 

Thomas Witzke

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

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