Formula: Sb2Te3
Reflected/transmitted colour: RL pinkish cream
Pleochroism: RL weak, from pink to cream
Optical isotropy/anisotropy: RL moderate, in pink and dark gray
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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