Magnesium fluoride is an inorganic compound with the system MgF2. The compound is a white crystalline salt and is clear over a variety of wavelengths, with industrial makes use of in optics which might be additionally utilized in area telescopes. It happens naturally because the uncommon mineral sellaite.
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Manufacturing and construction[edit]
Magnesium fluoride is ready from magnesium oxide with sources of hydrogen fluoride akin to ammonium bifluoride:
Associated metathesis reactions are additionally possible.
The compound crystallizes as tetragonal birefringent crystals. The construction of the compound is much like that in rutile, that includes octahedral Mg2+ facilities and 3-coordinate fluoride centres.[4]
Makes use of[edit]
Optics[edit]
Magnesium fluoride is clear over a particularly big selection of wavelengths. Home windows, lenses, and prisms made from this materials can be utilized over the whole vary of wavelengths from 0.120 μm (vacuum ultraviolet) to eight.0 μm (infrared). Excessive-quality, artificial magnesium fluoride is one in all two supplies (the opposite being lithium fluoride) that may transmit within the vacuum ultraviolet vary at 121 nm (Lyman alpha). Decrease-grade magnesium fluoride is inferior to calcium fluoride within the infrared vary.[citation needed]
Magnesium fluoride is hard and polishes nicely however is barely birefringent and will subsequently be lower with the optic axis perpendicular to the aircraft of the window or lens.[4] Resulting from its appropriate refractive index of 1.37, magnesium fluoride is often utilized in skinny layers to the surfaces of optical parts as an affordable anti-reflective coating.[citation needed] Its Verdet fixed is 0.00810 arcmin⋅G–1⋅cm–1 at 632.8 nm.[5]
Security[edit]
Continual publicity to magnesium fluoride could have an effect on the skeleton, kidneys, central nervous system, respiratory system, eyes and pores and skin, and should trigger or irritate assaults of bronchial asthma.[6]
References[edit] – “magnesium fluoride formula”
Exterior hyperlinks[edit]
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