Cesium salt, examination

Cesium, first discovered by Bunsen and Kirchoff ia 1860 while examining spring water, was the first element discovered spectroscopically (1). The name, comes from the Latin caesius, sky blue, and refers to the characteristic blue spectral lines of the element. Cesium salts were not successfully reduced to metal until 1881. Electrolysis of the molten chloride did not yield cesium metal under the same conditions that led to the reduction of the other alkaU metal chlorides. 

Cesium salt added by wetness impregnation (10 % w/w) has a sintering effect on the calcination of samarium phosphate. The examination of structural and textural data shows that the cesium does not enter the crystalline network. The cesium salt is uniformly distributed on crystallites surface and the special morphology of samarium phosphate makes the cesium retained in the porosity of the solid. 

Luzgin et al. used MAS to examine the mechanism of dimethyl ether (DME) carbonylation with carbon monoxide has heen studied on solid metal-containing acidic cesium salt of 12-tungstophosphoric acid, M/CS2HPW12O40 (M/HPA, M = Ag, Pt, and Rh). The kinetics of the reaction has been monitored with MAS NMR in... 

Since the degree of supersaturation and concentration of salt are largest in the cesium fluoride system, the largest clusters seem to be formed in solution, as expected. However, since the number of ions in solutions examined are too small, the clusters cannot grow to the size of nuclei of crystals. Nevertheless, it can be seen from Fig. 7 that small aggregates, which may be regarded as embryos for crystallization, become the cores of crystals, and have an irregular shape. 

The main disadvantage of this detector is that its performance deteriorates with time. Reese [8] examined the performance of the NPD in great detail. The alkali salt employed as the bead is usually a silicate and Reese demonstrated that the loss in response was due to water vapor from the burning hydrogen converting the alkali silicate to the hydroxide and free silica. Unfortunately, at the normal operating temperature of the bead, the alkali hydroxide has a significant vapor pressure and consequently, the rubidium or cesium is... 

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