Materion Ytterbium Fluoride, YbF3

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Materion Ytterbium Fluoride, YbF3
Categories:	Ceramic; Halide
Material Notes:	Ytterbium Fluoride, YbF3, is a low-index film material that exhibits good transparency from the UV through far-infrared regions. The films are insoluble and show low stress, making YbF3 a useful substitute for ThF4 in many IR applications. It can be combined in multi-layers with higher-index ZnS, ZnSe and Ge layers and with other fluoride compounds. Typical applications are in AR, long-wave pass, short-wave pass, and filter coatings in the 3 to 11µm wavelength range. A particular advantage that Ytterbium fluoride coatings provide is the minimum appearance of water absorption bands in the Mid-IR region. Information provided by Materion.
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Physical Properties	Original Value	Comments

Density	8.17 g/cc	Crystal
Molecular Weight	230 g/mol

Thermal Properties	Original Value	Comments
Melting Point	1157 °C

Optical Properties	Original Value	Comments
Refractive Index	1.529 @Wavelength 2250 nm
	1.532 @Wavelength 1050 nm
	1.536 @Wavelength 650 nm
	1.537 @Wavelength 450 nm
	1.54 @Wavelength 400 nm
	1.545 @Wavelength 350 nm
	1.557 @Wavelength 300 nm
	1.57 @Wavelength 275 nm

Descriptive Properties
Color	White
Evaporation Temperature	900°C

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CMATER914 / 323620

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