Formula: (La, Ca)Cu6(AsO4)3(OH)6.3H2O
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: uniaxial
Optical sign: +
Refractive indices: ω = 1.725, ε = 1.810 (agardite-(Ce)); ω = 1.701, ε = 1.782 (agardite-(Y))
Birefringence δ: 0.085 (agardite-(Ce)); 0,081 (agardite-(Y))
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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