Formula: Ca2Cu(UO2)(CO3)4.6H2O
Reflected/transmitted colour:
Pleochroism: Dark blue to blue-green (X), deep bluish green to bluish green(Y), pale yellow (Z)
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: α = 1.541, β = 1.547, γ = 1.564
Bireflectance/Birefringence δ: 0.023
2V angle: 62° (calculated), 60° (measured)
Dispersion: Vert strong, r < v
Optical orientation: X = b, Z Ù c = 33-36°
Optical axial plane:
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