Polyquaternaryalkylammonium iodide-silver iodide compounds with high ionic conductivity in the solid state have been prepared. The systems (RzN-(CH2),-NRa) I2 --AgI, at 1:12 ratio, give specific conductivities of the order of 10 -2 (ohm • cm)-L For the system octamethyldiethylentriammonium iodide-silver iodide in the ratio 1: 22, the specific conductivity reaches, at room temperature, a value of 5.8 • 10 -2 (ohm • cm) -1 * Electrochemical Society Active Member.

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A new crystalline layered inorganic ion-exchanger with formula Zr( HAsO,) (HP0,)-H,O has been prepared by refluxing the amorphous product. Its ion-exchange properties towards sodium ions and its thermal behaviour, together with that of the pure sodium phases obtained, are reported and discussed. The exchanger is very stable to hydrolysis and has a high exchange capacity. Its general behaviour is intermediate between that of Zr( H PO,),-H,O and Zr( HAsO,),=H,O.

Das thermische Verhalten der Schichtverbindung (III) einschließlich der Phasenübergänge wird zwischen 20 und I300°C durch TG‐, DTA‐ und Röntgen‐Pulverbeugungsmessungen untersucht.