Knowra Magnesium fluoride Magnesium fluoride Magnesium fluoride (MgF₂) is an ionic inorganic solid made of magnesium and fluoride ions. Its transparency across a wide range of wavelengths makes it useful in optical components and coatings.
Antireflection coating : A thin optical layer designed to reduce reflection from a surface through interference. MgF₂ is widely used as a single-layer coating on glass to reduce reflected light.
Rutile structure : A tetragonal crystal structure adopted by rutile and several other compounds, including magnesium fluoride. MgF₂ crystals have this structure, which shapes their optical anisotropy.
Magnesium : A lightweight alkaline-earth metal with atomic number 12. Magnesium forms the doubly charged cation in magnesium fluoride.
Calcium fluoride : An ionic compound, CaF₂, that occurs naturally as the mineral fluorite and is used in optics. CaF₂ is another transparent fluoride optical material, with different crystal symmetry and optical behavior.
Optical window : A transparent component that separates environments while transmitting selected wavelengths of light. MgF₂ windows transmit ultraviolet and infrared radiation in optical instruments.
Ionic bond : An electrostatic attraction between oppositely charged ions formed through electron transfer or redistribution. The magnesium and fluoride ions in MgF₂ are held together by ionic interactions.
Fluoride : The anion F⁻, formed when a fluorine atom gains one electron. Two fluoride anions balance each magnesium cation in MgF₂.
Lithium fluoride : An ionic compound, LiF, used in optical components and as a material in radiation detectors. LiF transmits into shorter ultraviolet wavelengths, while MgF₂ offers different mechanical and optical properties.
Lithography : A patterning process that transfers geometric designs onto a surface, especially in semiconductor manufacturing. MgF₂ serves as a transparent material in some ultraviolet optical systems used for lithography.
Birefringence : The dependence of a material’s refractive index on the polarization and direction of light. The crystal’s tetragonal symmetry gives MgF₂ different refractive indices along different axes.
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