Caesium amalgams

I Attention is called to the close analogy in modes of preparation and properties of the caesium and rubidium compounds. For caesium-amalgam, see this series, VoL III. 

The density of the hydride is 0-92,8 and the vapour-tension for each interval of 10° between 300° C. and 410° C. is 15, 17, 21, 27, 38, 55, 87, 186, 201, 285, 396, and 540 mm. respectively.7 Sodium hydride is the most stable of the alkali-metal hydrides, and caesium hydride the least. The sodium derivative is unaffected by dry air, but decomposes in presence of traces of moisture. Although insoluble in organic solvents such as carbon disulphide, carbon tetrachloride, benzene, and turpentine, it dissolves in the alkali-metals and their amalgams. 

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