Formula: Sr3Na2Zr(CO3)6.3H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.558, β = 1.646, γ = 1.648
Bireflectance/Birefringence δ: 0.090
2V angle: 16° (calculated), about 15° (measured)
Dispersion:
Optical orientation:
Optical axial plane:
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