Formula: Ca(UO2)3(SeO3)2(OH)4.4H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.54, β = 1.73, γ = 1.75
Bireflectance/Birefringence δ: 0.21
2V angle: 32° (calculated), 33° (measured)
Dispersion: r > v
Optical orientation:
Optical axial plane:
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