Calcium fluoride crystal

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Summary： The advantages of calcium fluoride single crystals include a wide application wavelength range (155-7000 nm), high laser damage threshold, low stress birefringence, and high refractive index.

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Calcium fluoride single crystals have advantages such as a wide application band (155-7000nm), high laser damage threshold, low stress birefringence, and high refractive index. Their drawbacks include relatively low hardness and poor temperature resistance. Sizes range from φ5mm to φ150mm, and they are used in laser (especially deep ultraviolet excimer laser lithography), infrared, ultraviolet optics, and high-energy detection fields. They are materials used to make optical elements such as prisms, lenses, and windows in optical systems.

Physical and Mechanical Properties
Density	3.18 g/cm³	Thermal Expansion Coefficient	1.89×10 ^⁻⁵/℃
Purity	99.999%	Thermal Conductivity	9.71 J/k.m.s
Refractive Index	1.39908	Heat Capacity	0.854 J/g.K
Knoop Hardness	158.3 kg/mm²	Young's Modulus	75.8 GPa
Melting Point	1360 ℃	Poisson's Ratio	0.26

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