Formula: AgCu7Te10
Reflected/transmitted colour: gray
Pleochroism: slight, pale gray to pale brownish gray
Optical isotropy/anisotropy: distinct, medium gray to slate-gray to brownish gray
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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