Formula: Ag5Pb8Bi13S30
Reflected/transmitted colour: RL galena-white
Pleochroism: RL absent in air, absent to weak in oil
Optical isotropy/anisotropy: RL distinct to strong, in light gray to steal bluish black
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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