Formula: Pb4FeSn4Sb2S16
Reflected/transmitted colour: galena-white
Pleochroism: exceptionally weak in air, stronger in oil
Optical isotropy/anisotropy: distinct anisotropic, gray to pale yellowish or brownish gray
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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