Formula: (UO2)MoO4.4H2O
Reflected/transmitted colour:
Pleochroism: Dark blue (X), light blue (Y), olive green (Z)
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.660, β = 1.831, γ = 1.915
Bireflectance/Birefringence δ: 0.255
2V angle: 64° (calculated), 65° (measured)
Dispersion: r > v
Optical orientation: Y = b, X Ù c ≈ 90°5', Z ≈ a
Optical axial plane:
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