MgF2 Magnesium Fluoride

Magnesium Fluoride

(

MgF₂

)

Eigenschaften
Transmission Range	0.118 - 8.5 µm (thickness 2mm)
Refractive Index	n_o = 1.375, n_e = 1.389 @633nm
Reflection Loss	2.52%@0.633 µm
Residual Beam Wavelength	20.0 µm
Density	3.177 g/cm³
Melting point	1255°C
Molecular Weight	62.32
Thermal Conductivity	\|\| C: 21 W/(m·K) @300K, ⊥ C: 33.6 W/(m·K) @300K
Spec. Heat Capacity	1004 J/(kg·K)
Thermal Expansion	\|\| C: 8.9 · 10^-6/K; ⊥ C: 13.7 · 10^-6 /K @293K
Hardness (Mohs)	415 (Mohs)
Young's Modulus	138.55 GPa
Shear Modulus	54.66 GPa
Bulk Modulus	101.32 GPa
Rupture Modulus	60 MPa
Elastic Coefficient	C₁₁ = 138; C₁₂ = 88; C₁₃ = 62; C₃₃ = 201; C₄₄ = 56.5; C₆₆ = 95.6 GPa
Dielectric Constant	\|\| C: 4.87; ⊥ C: 5.45 @95 Khz - 42 MHz
Solubility in Water	< 0.0002g / 100g @ 0°...60°C
Crystal Structure	single crystal, synthetic
Crystal Type	tetragonal, rutile type structure, a= 4.623 Å; c= 3.053 Å
Cleavage Planes	(110) (bad)
Poisson Ratio	0.276
Application	VUV optics (space technology), polarizing optics, windows and prisms for excimer lasers
Remarks	max. temperature for application: 500°C
Remarkable	Has an excellent ultraviolett transmission (up to 118 nm) Small refractive index Used for excimer laser applications Slightly birefringent, application as a polarizer A diameter of 200 mm is the maximum size of our optics

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MgF2 – Magnesium Fluoride: Korth Kristalle - Vom Rohkristall zur hochpräzisen Optik. Durchblick für alle Wellenlängen - Seit 72 Jahren züchten wir Kristalle und fertigen daraus hochpräzise optische Komponenten für alle Wellenlängen vom IR- bis zum VUV-Bereich. Unsere Produkte kommen in allen Bereichen zum Einsatz, in denen eine hochentwickelte, präzise technische Ausstattung unerlässlich ist – von der Analytik bis hin zur Medizin- und Raumfahrttechnik.