Formula: Pb2CO3O
Reflected/transmitted colour: White (RL) due to white internal reflections
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: a = 1.642, b = 1.645, g = 1.654
Bireflectance/Birefringence δ: 0.012
2V angle: 62 (calculated), 52 (measured)
Dispersion:
Optical orientation:
Optical axial plane:
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