Niccolite-Nickeline (Reflected Light)

Niccolite-Nickeline (NiAs) optical properties using a reflected-light polarizing microscope (adapted from Spry & Gedlinske, 1987):

System: Hexagonal

Reflectance: Strong

Colour: Yellowish pink to brownish orange-pink

VHN and polishing hardness: 363 - 372 / hard

Pleochroism: Weak to moderate; yellowish, pinkish white to pale pinkish brown, orange

Anisotropism: Strong; yellowish, greyish green, violet-blue, blue-grey

Internal reflections: Not present

Twinning: Rare

Commonly associated minerals: Ag and Bi minerals, allargentum, breithauptite, gersdorffite, gold, maucherite, molybdenite, pitchblende, rammelsbergite, skutterudite, ullmanite, uraninite

Sample from the EOSC424 reflected light sample collection at UBC

Видео Niccolite-Nickeline (Reflected Light) канала Nichole Moerhuis