Aluminium tetrafluoride

Akdeniz, Z., Cicek, Z., Karaman, A. et al. (1999) Ionic interactions in alkali - Aluminium tetrafluoride clusters. Z... 

Xenon difluoride (or the tetrafluoride, or their mixtures) could not be caused to detonate by impact. Xenon difluoride and xenon tetrafluoride both may cause explosion in contact with acetone, aluminium, pentacarbonyliron, styrene, polyethylene, lubricants, paper, sawdust, wool or other combustible materials. Their vigorous reactions with ethanol, potassium iodate or potassium permanganate are not explosive, however. 

Raney cobalt alloy, see Aluminium—cobalt alloy, 0049 Raney nickel alloys, see Aluminium—nickel alloys, 0055 Resorcinol diacetate, see 1,3-Diacetoxybenzene, 3285 Resorcinol, see 1,3-Benzenediol, 2325 Rhenium hexafluoride, 4367 Rhenium hexamethoxide, 2599 Rhenium nitride tetrafluoride, 4338 Rhenium, 4884... 

Silicon tetrafluoride is thus a volatile compound because the molecule is shielded in the gas phase, that is to say that the charge has already reached the coordination number in contrast, for example, with sodium fluoride, where this is only i against 6, magnesium fluoride and aluminium fluoride where this ratio amounts respectively to 2 and 3 to 6. 

Molybdenum Carbides.—The carbide, MojC, may be obtained by heating molybdenum dioxide with carbon or with calcium carbide in an electric furnace. The product shows a brilliant, white, crystalline fracture, cleaves readily, and has a density of 8-9. If a mixture of fused molybdenum, carbon, and excess of aluminium is heated in the electric furnace, the carbide, MoC, is obtained as a grey crystalline powder, of density 8-40 at 20° C., and of hardness 7 to 8. It burns readily in fluorine, forming carbon tetrafluoride and molybdenum... 

The corresponding chloride and bromide are made by heating the dioxide with carbon tetrachloride and aluminium bromide respectively. The only tetrahalide of plutonium yet isolated is the fluoride, PUF4, although the tetrachloride appears to exist in solution. Americium forms a tetrafluoride and also a complex fluoride, KAmFg. 

The sodium beryllium fluoride product is soluble in water and can be leached out, together with some aluminium, excess sodium silicofluoride, and small amounts of other impurities. Unfortunately a high proportion of the valuable fluorine is lost as the gaseous and highly toxic silicon tetra-fluoride, or as undissolved sodium aluminium fluoride. However, the escape of volatile silicon tetrafluoride can be prevented if a small amount of sodium fluoride is present with the sodium silicofluoride, owing to the reaction... 

The book by Prof. Yanko [1] discusses a mechanism of degradation of the flue walls, stating that the main corrosion agents are aluminium fluoride and sodium fluoride. The temperature of evaporation of aluminium fluoride is - 950 °C, while the temperature of evaporation of sodium fluoride is - 1,050 °C. Volatile sodium and aluminium fluoride penetrate the permeable pores of refractory [1] and interact with silica, giving volatile silicon tetrafluoride, while sodium oxide is released in the pores ... 

In striking contrast to the dehydrochlorination of hydrochlorocarbons at oxides, observed above room temperature, is the room temperature dehydrochlorination of CH3CCI3 in the presence of resubUmed solid aluminium trichloride, 7-alumina that has been chlorinated using CCLi in order to enhance surface Lewis acidity or 7-alumina previously fluorinated at room temperature using sulfur tetrafluoride. ... 

Treatment of sy/M-dichlorotetrafluoroacetone and sy/n-tetrachlorodifluoro-acetone with aluminium bromide has been shown to cause replacement of fluorine by bromine, whereas hexafluoroacetone resists such attack. The reaction between t-butylbenzene and hexafluoroacetone in the presence of aluminium chloride has been used to procure the negatively substituted derivativep-(CF3)jC(OH)-C,H4Bu and hence (via fluorination with sulphur tetrafluoride) the perfluoroisopropyl compound -(CFalaCF C.HiBut for sulphonation studies. 

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