Formula: Cu3BiS3
Reflected/transmitted colour: RL white, creamy to grayish
Pleochroism:
Optical isotropy/anisotropy: RL weak, shades of dark brown
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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