Cesium synthesis

4synthesis methods

Product Name:Cesium
CAS Number:7440-46-2
Molecular formula:Cs
Molecular Weight:132.91

Although Cesium metals have been prepared by fused salt electrolysis, the highly reactive nature of the metals complicates the collection step and favors the use of other preparative methods where the metals can be removed in vapor form from the reaction mixture. The oxides, hydroxides, carbonates, halides, sulphates, chromates and nitrates of Cesium have been reduced to the metals by strong reducing metals such as sodium, calcium, magnesium, barium, iron, zirconium, aluminum or silicon at moderately high temperatures. The preferred method, however, involves the reduction of the anhydrous metal chlorides with calcium metal under vacuum. Anhydrous cesium chloride is mixed with a large excess of calcium chips and heated under vacuum at 700-800°C. As the chloride is reduced, metal vapors issue from the reaction mixture and are led under the vacuum to a cooler portion of the vessel where they condense and drop into a collection vessel.

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Yield:7440-46-2 90%

Reaction Conditions:

in neat (no solvent);byproducts: caesium nitride, caesium silicate; CsN3 was decomposed at 390 °C forming Cs and a yellowish gray residue (contains ca. 70% Cs-nitride beside Cs-silicate and not-reacting Cs-azide);;

References:

Suhrmann, R.;Clusius, K. [Zeitschrift fur anorganische Chemie,1926,vol. 152,p. 55 - 55]

534-17-8 Synthesis