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- High UV Transparency: Na₃AlF₆ is transparent in the UV and IR spectral regions, making it suitable for optical coatings in UV-sensitive applications.
- Good Adhesion: Forms thin films with excellent adhesion to a variety of substrates.
- Low Refractive Index: Offers a low refractive index, which is beneficial for anti-reflective coatings and optical interference filters.
- Corrosion Resistance: Provides a protective layer with good resistance to chemical and environmental factors.
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- Wide Transmission Range: 0.25–20 μm (UV–IR region).
- High Optical Homogeneity: Excellent for infrared spectroscopy.
- Low Refractive Index: ~1.5 at 10 μm, minimizing reflection losses.
- Broad Chemical Compatibility: Transparent to most IR wavelengths.
- Machinable and Polishable: Enables precise fabrication for optical systems.
- No Absorption Bands in IR: Ideal for FTIR applications.
- Isotropic Cubic Structure: Easy cleavage along (100) plane.
- Cost-effective Alternative: Compared to ZnSe or KBr for many IR optical uses.