Formula: CaCu(UO2)(PO4)2.4H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 1.622, γ = 1.634
Bireflectance/Birefringence δ: 0.012
2V angle:
Dispersion: Strong, r > v to r < v
Optical orientation: Parallel extinction, length slow
Optical axial plane:
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