Formula: CuInS2
Reflected/transmitted colour: opaque, polished section gray with a slight bluish tint
Pleochroism:
Optical isotropy/anisotropy: polished section weak anisotropic, polysynthetic twinning can be visible
Optical sign:
Refractive indices:
Birefringence δbireflectance: polished section, not indicated
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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