Formula: Cu3As2O7(OH)2
Reflected/transmitted colour: Pale green in thin section
Pleochroism:
Optical isotropy/anisotropy: Uniaxial
Optical sign: +
Refractive indices: ω = 1.759–1.760, ε = 1.759–1.760
Bireflectance/Birefringence δ: very weak
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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