Zeunerite

Formula: Cu (UO2)2 (AsO4)2 .10-16H2O

Reflected/transmitted colour:

Pleochroism:

Optical isotropy/anisotropy: Uniaxial

Optical sign: -

Refractive indices: ε = 1.576-1.623, ω = 1.585-1.643

Bireflectance/Birefringence δ: 0.009-0.020

2V angle:

Dispersion:

Optical orientation:

Optical axial plane:

 

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