Formula: NaF
Reflected/transmitted colour:
Pleochroism: Strong, yellow (E), pink to deep carmine (O)
Optical isotropy/anisotropy: Isotropic, weak anomalous anisotropism, then uniaxial (-_
Optical sign:
Refractive indices: n = 1.327-1.328
Bireflectance/Birefringence δ:
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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