Formula: KMgCl3 . 6H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: α = 1.467, β = 1.4755, γ = 1.494
Bireflectance/Birefringence δ: 0.027
2V angle: 70° (calculated), 70° (measured)
Dispersion: None
Optical orientation:
Optical axial plane:
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