Formula: (NH4)(UO2)(PO4).3H2O
Reflected/transmitted colour:
Pleochroism: Colourless (X), pale green (Y=Z)
Optical isotropy/anisotropy: Biaxial, anomalous
Optical sign: -
Refractive indices: α = 1.564, β = 1.585, γ = 1.585
Bireflectance/Birefringence δ: 0.021
2V angle: 0° (calculated), 0-3° (measured)
Dispersion: Strong, r > v
Optical orientation:
Optical axial plane:
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