Formula: Cu(UO2)(OH)4
Reflected/transmitted colour: Green
Pleochroism: Blue green (x), yellow green (z)
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.765, β = 1.792, γ = 1.800
Bireflectance/Birefringence δ: 0.035
2V angle: 56° (calculated), 90° (measured)
Dispersion: Strong
Optical orientation: Z Ù elongation ≈ 40°
Optical axial plane:
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