Formula: Ca(UO2)3(CO3)(OH)6.3H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.66, β = 1.712, γ = 1.736
Bireflectance/Birefringence δ: 0.076
2V angle: 66° (calculated), 67° (measured)
Dispersion: Weak
Optical orientation: X = a, Y = b, Z = c
Optical axial plane:
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