Formula: Cu6FeSn2S8
Reflected/transmitted colour: pale rose in reflected light
Pleochroism:
Optical isotropy/anisotropy: weak anisotropic, in shades of brown
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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