Formula: (As,Sb)11S18
Reflected/transmitted colour: RL goldn yellow to lemon yellow, with golden internal reflections
Pleochroism: RL strong
Optical isotropy/anisotropy: RL weak
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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