Formula: NaPbCu5(AsO4)4Cl.5H2O
Reflected/transmitted colour:
Pleochroism: Turquoise blue (ε), pale blue or light green (ω)
Optical isotropy/anisotropy: Uniaxial
Optical sign: -
Refractive indices: ε = 1.71, ω = 1.77
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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