Бериллий фториді: қасиеттері, қолданылуы және қауіптері

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| ImageFile1 = BeF2str. PNG
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| ImageFile2 = Beryllium fluoride 2D dimensions. png
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| ImageFile3 = Beryllium fluoride. JPG
| ImageSize3 = 240px
| IUPACName = Beryllium fluoride
| OtherNames = Beryllium difluoride Difluoroberyllane
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|Section7=Chembox Hazards
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| ExternalSDS = InChem MSDS
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| GHSSignalWord = DANGER
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| FlashPt = Non flammable
| LD50 = 90 mg/kg (oral, rat)100 mg/kg (oral, mouse)
| REL = Ca C 0.0005 mg/m3 (as Be)
| PEL = TWA 0.002 mg/m3C 0.005 mg/m3 (30 minutes), with a maximum peak of 0.025 mg/m3 (as Be) The Be F bond lengths are about 1.54 Å. Analogous to SiO2, BeF2 can also adopt a number of related structures. An analogy also exists between BeF2 and AlF3: both adopt extended structures at mild temperature.

Gaseous beryllium fluoride adopts a linear structure, with a Be F distance of 143 pm. Molecular |BeF2 in the gaseous state is isoelectronic to carbon dioxide. "Molecules" of liquid beryllium fluoride have a fluctuating tetrahedral structure. Additionally, the density of liquid BeF2 decreases near its freezing point, as Be2+ and F− ions begin to coordinate more strongly with one another, leading to the expansion of voids between formula units.

Beryllium fluoride is used in biochemistry, particularly protein crystallography as a mimic of phosphate. Thus, ADP and beryllium fluoride together tend to bind to ATP sites and inhibit protein action, making it possible to crystallise proteins in the bound state. Beryllium fluoride forms a basic constituent of the preferred fluoride salt mixture used in liquid fluoride nuclear reactors. Typically beryllium fluoride is mixed with lithium fluoride to form a base solvent (FLiBe), into which fluorides of uranium and thorium are introduced. Beryllium fluoride is exceptionally chemically stable, and LiF/BeF2 mixtures (FLiBe) have low melting points (360–459 °C) and the best neutronic properties of fluoride salt combinations appropriate for reactor use. MSRE used two different mixtures in the two cooling circuits.