Formula: AlVO4.3H2O
Reflected/transmitted colour: Colourless
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: α = 1.730, β = 1.734, γ = 1.752
Bireflectance/Birefringence δ: 0.022
2V angle: n.d.
Dispersion:
Optical orientation:
Optical axial plane:
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