Lattice energy hydroxides

The MEG model has been extensively used to determine lattice energies and interionic equilibrium distances in ionic solids (oxides, hydroxides, and fluorides Mackrodt and Stewart, 1979 Tossell, 1981) and defect formation energies (Mack-rodt and Stewart, 1979). Table 1.21 compares the lattice energies and cell edges of various oxides obtained by MEG treatment with experimental values. 

Cesium hydroxide. (CAS 21351-79-i (. CsOH, is the strongest of the Use alkali metal hydroxides, as would be expected front its position in the periodic table (francium hydroxide, when prepared, would he expected to be stronger). For the same reason, it has the lowesl lattice energy of the live (135.6 kcal per mole). 

The Lattice Energies (kcal/mole) of the Alkali Metal Hydroxides... 

The lattice energies of the alkali metal hydroxides, the alkali metal amides, the alkaline earth chacogenides and the alkaline earth imides, give values for A/7/ OH (g) etc. and so enable the proton affinities of these groups to be calculated. The values obtained are given in Table XXIX. 

Lattice energies, alkali metal salt values, amides and, 196 azides and, 198-199 bifluorides and, 199 borofluorides and, 203 borohydrides and, 197 chalcogenides and, 192,193 cyanates and, 199-200 cyanides and, 196-197 halides and, 189, 190 hydrides and, 189, 191, 192 hydrosulfides and, 195-196 hydroxides and, 192,194, 195 nitrates and, 201 superoxides and, 197-198 thiocyanates and, 200 alkaline earth salt values, acetylides and, 198 carbonates and, 202-203 chalcogenides and, 192, 193 imides and, 196 peroxides and, 198 calculation uses, absolute enthalpies and, 206 electron affinity determination and, 203-204... 

The material precipitated by alkali from aqueous silver salts cannot be completely freed of water without decomposition that precipitated from alcoholic solution is the hydroxide, AgOH, which can be made only in this way. The oxide is decomposed completely into silver and oxygen at 300° under normal pressure. It gives an alkaline reaction in water, the solubility though slight is in conformity with a low lattice energy. Its heat of formation is only 7.3 kcal. 

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