Formula: Na(H3O)(UO2)3(SeO3)2O2·4H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: a=1.597, b=1.77, g=1.775
Bireflectance/Birefringence δ: 0.178
2V angle: 16 (calculated), 20 (measured)
Dispersion: Strong, r < v
Optical orientation:
Optical axial plane:
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