Formula: U(UO2)3(PO4)2(OH)6.4H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.704, β = 1.715, γ = 1.718
Bireflectance/Birefringence δ: 0.014
2V angle: 54° (calculated), 56° (measured)
Dispersion:
Optical orientation:
Optical axial plane:
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