Wulfenite

Formula: PbMoO4

Reflected/transmitted colour: polished section gray-white with strong and abundant, colourless, yellow and orange-yellow internal reflections

Pleochroism:

Optical isotropy/anisotropy: polished section anisotropy obscured by internal reflections

Optical sign:

Refractive indices:

Birefringence δ/bireflectance: polished section in air weak, more distinct in oil

2V angle:

Dispersion:

Optical orientation:

Optical axial plane:

 

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