Formula: Ag7Pb6Bi15S32
Reflected/transmitted colour: White (RL)
Pleochroism:
Optical isotropy/anisotropy: Distinct to strong anisotropic, in light gray to steel bluish black
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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