Formula: C6H4(CO)2NH
Reflected/transmitted colour:
Pleochroism:
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: a = 1.501, b = 1.519, g = 1.755
Bireflectance/Birefringence δ: 0.254
2V angle: n.d.
Dispersion:
Optical orientation: Y Ù c @ 16°
Optical axial plane:
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