Uraninite

Formula: UO2

Reflected/transmitted colour: Pale green, pale yellow, deep brown; RL pale gray with brownish tint, may show dark brown internal reflections

Pleochroism:

Optical isotropy/anisotropy: Isotropic

Optical sign:

Refractive indices:

Bireflectance/Birefringence δ:

2V angle:

Dispersion:

Optical orientation:

Optical axial plane:

 

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