Dyscrasite

Formula: Ag3Sb

Reflected/transmitted colour: opaque, polished section pure white (in air), in oil slightly grayer

Pleochroism: very weak

Optical isotropy/anisotropy: polished section weak to distinct anisotropic

Optical sign:

Refractive indices:

Birefringence δ/bireflectance: polished section weak, white to creamy white

2V angle:

Dispersion:

Optical orientation:

Optical axial plane:

 

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