Formula: Ni11As8
Reflected/transmitted colour: opaque, polished section when massive and isolate from other minerals; plain white, otherwise pinkish gray
Pleochroism:
Optical isotropy/anisotropy: polished section weak to distinct anisotropic, only visible in oil, light gray to dark gray
Optical sign:
Refractive indices:
Birefringence δ/bireflectance: polished section bireflectance not observable
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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