Formula: Mg(OH)2
Reflected/transmitted colour: colourless
Pleochroism: -
Optical isotropy/anisotropy: uniaxial
Optical sign: +
Refractive indices: w = 1.560-1.590, ε =1.580-1.600
Birefringence δ: 0.012-0.020 (may be anomalous)
2V angle:
Dispersion: strong
Optical orientation:
Optical axial plane:
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