Cesium iododichloride

Other methods which have been suggested for the separation of cesium from pollucite include the conversion of the mineral to carbonates, followed by the extraction of cesium carbonate with ethanol,15 and the precipitation of cesium iododichloride. The use of cesium iododichloride was first suggested by Wells.8 This provides the basis for procedure C. 

Cesium iododichloride can be converted quantitatively to cesium chloride by heating for several hours at 150 to 200°, until the powder is pure white in color and no longer smells of iodine monochloride. 

Since the principal impurities in cesium compounds are other alkali metals, analysis by conventional methods is difficult. Unrecrystallized cesium iododichloride prepared by this method was analyzed spectroscopically and found to contain 0.01 to 1.0% rubidium and traces of other metals. 

Cesium iododichloride crystallizes in beautiful orange rhombohedral needles or plates. The compound is stable indefinitely in closed containers but slowly whitens when exposed to air, reverting to cesium chloride. The cesium trihalides are more stable thermally and less soluble than those of the other alkali metals. 

CsICl2 Cesium iododichloride, 4 9 CsNOs Cesium nitrate, 4 6 1-hydrogen nitrate, 4 7 CsN3 Cesium azide, 1 79 CuBr Copper(I) bromide, 2 3 CuCl Copper(I) chloride, 2 1 [CuC1-CO]-2H20 Copper carbonyl chloride, 2 4... 

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