Formula: (Pd,Pt)3(As,Sb,Te)
Reflected/transmitted colour: RL light brownish gray
Pleochroism: RL weak
Optical isotropy/anisotropy:
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ: RL weak, from greenish gray to dark brown
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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