Formula: Zn(OH)2
Reflected/transmitted colour: Colourless
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: α = 1.5722, β = 1.5781, γ = 1.5801
Bireflectance/Birefringence δ: 0.0079
2V angle: 60° (calculated), 60° (measured)
Dispersion:
Optical orientation:
Optical axial plane:
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