Formula: Mg(HCO3)(OH).2H2O
Reflected/transmitted colour: Colourless
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.412, β = 1.501, γ = 1.526
Bireflectance/Birefringence δ: 0.114
2V angle: 53° (measured)
Dispersion: Weak, r < v
Optical orientation: X = a, Y = b, Z ≈ c
Optical axial plane:
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