Formula: Al(UO2)2V2O8(OH).11H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.65, β = 1.85, γ = 1.90
Bireflectance/Birefringence δ: 0.25
2V angle: 48° (calculated), 44° (measured)
Dispersion:
Optical orientation:
Optical axial plane:
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