Aluminium fluorides

AIF3 is a possible reaction product from decoy flare compositions using MgAl alloy. Although the fluoroaluminate Mg2 [AIF5] is a likely main combustion product, there 

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Aluminium fluoride (anhydrous) [7784-18-4] M 84.0, m 250°. Technical material may contain up to 15% alumina, with minor impurities such as aluminium sulfate, cryolite, silica and iron oxide. Reagent grade AIF3 (hydrated) contains only traces of impurities but its water content is very variable (may be up to 40%). It can be dried by calcining at 600-800° in a stream of dry air (some hydrolysis occurs), followed by vacuum distn at low pressure in a graphite system, heated to approximately 925° (condenser at 900°) [Henry and Dreisbach J Am Chem Soc 81 5274 1959]. 

In fluoride glasses, calcium fluoride is an essential constituent, but generally cryolite, NajAlFg, is also added as a flux to lower the temperature of fusion. Aluminium orthophosphate is also generally added to the fusion mixture for various reasons. Of course, the various elements may be added in different ways. Thus, calcium orthophosphate, aluminium fluoride and sodium carbonate are often used in the preparation of fluoride glasses. 

Connick, R. E. Poulsen, R. E. (1957). Nuclear magnetic resonance studies of aluminium fluoride complexes. Journal of the American Chemical Society, 79, 5153-7. 

Aluminium borohydride Aluminium chloride Aluminium chlorate Ammonium tetrachloroaluminate Aluminium fluoride Aluminium trihydroxide Aluminium ammonium sulphate Aluminium potassium sulphate Aluminium nitride Aluminium nitrate Sodium aluminate Aluminium sodium aluminate Aluminium phosphate Aluminium phosphide Aluminium borate Aluminium oxychloride Aluminium fluorosilicate Aluminium magnesium silicate Aluminium sulphate... 

Whether mixtures of the perchlorate with aluminium truly detonate is under debate. However, appropriate compositions certainly explode violently even when uncontained, so the deflagration/detonation dispute is essentially academic [1]. Presence of aluminium fluoride increases the ease of ignition of aluminium-perchlorate mixtures, owing to complex fluoride formation [2],... 

Aluminium fluoride Saturated s s Calcium hydroxide Saturated s s... 

NH4, Rb) (52). According to new work of Garion and Wanklyn [107) the corresponding ternary aluminium fluorides of Lithium and Natrium show a superstructure of this type. 

Ammino-aluminium Fluoride.—Aluminium lluoridc combines slowly with ammonia one compound is reported, the monammine, [Al(NH3)]F3, which wras prepared by Clark.1... 

Ammino-derivatives of Aluminium Salts—Derivatives of Aluminium. Fluoride, Chloride, Bromide, Iodide. 

CsCl HgCl2=3 1, 2 1, 1 1, 2 3, 1 2, and 1 5 and five caesium antimonious fluorides where CsF SbF3=l 1, 3 4, 4 7, 1 2, and 1 3. According to I. Remsen s rale (1889) When a halide of any element combines with a halide of an alkali metal to form a double salt, the number of molecules of the alkali salt which are added to one molecule of the other halide is never greater, and is generally less than the number of halogen atoms contained in the latter—for instance, in the double fluoride of sodium and aluminium, where the negative halide has three fluorine atoms, no more than three molecules of sodium fluoride will be found united with one of aluminium fluoride. 

Flash inhibitor Potassium sulfate, potassium nitrate, potassium aluminium fluoride and sodium cryolite Reduce muzzle flash... 

Aluminium -fluorid V/3. 355 (A1CI3 + HF) ElObj, 280f. (AlClj or A1203 + HF)... 

The complex with ADP and aluminium fluoride is thought to resemble the early ADP.Pi state immediately after hydrolysis, whereas the complex with ADP and vanadate may represent a late state in which the phosphate (mimicked by vanadate) has moved quite a long distance (15 A) from the active center to the surface of the motor domain. There it is fixed by two hydrogen bonds to the solvent exposed tips of the switch-1 loop region (L9) at one side and the switch-2 loop (Lll) at the other side. 

A special flux consisting of the halides of alkali metals with the addition of sodium and aluminium fluorides was employed both to protect the aluminium melt from oxidation and to pre-heat the specimen to the required temperature. First, the flux was melted in a 26 mm inner diameter alumina crucible. Melting started at about 350°C. The height of the flux column was around 15 mm. Aluminium pieces were then melted under the flux layer. The amount of aluminium taken was equivalent to a volume of... 

The structure of T12A1F5 exhibits an infinite chain of octa-hedra, each with two opposite common corners. With four common corners sheets are produced T1A1F4 is an example of this. With the complex aluminium fluorides there are also other possibilities thus sheets are formed in Na5Al3 Fu with octahedra in which one third part have four corners in common, the remainder, however, only two (Brosset). 

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