Formula: Ca2Mg(AsO4)2.2H2O
Reflected/transmitted colour: Colourless
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.672, β = 1.685, γ = 1.698
Bireflectance/Birefringence δ: 0.026
2V angle: 88° (calculated), 90° (measured)
Dispersion:
Optical orientation:
Optical axial plane:
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