Ionic motions, phase transitions and structure of

Ionic motions, phase transitions and structure of
complex fluorides of stibium(III), containing ammonium ions:
NH4Sb4F13, NH4Sb3F10 and (NH4)2Sb3F11.

Kavun V.Ya. (kavun@ich.dvo.ru), Udovenko A.A.,
Sergienko V.I., Zemnukhova L.A., Slobodyuk A.B.

Institute of chemistry, Far Eastern Branch of Russian
Academy of Science, Vladivostok

Using 1H, 19F NMR method, a dynamics of the fluorine and ammonium ions in NH4Sb4F13, NH4Sb3F10 and (NH4)2Sb3F11 crystals in the temperature range of 180 - 440 K was studied. The kinds of ionic mobility were determined and their activation energy was established. The crystal structure of (NH4)2Sb3F11 was considerate. The presence of phase transitions in NH4Sb4F13 (150-175 K) and (NH4)2Sb3F11 (410-420 K) compounds was stated. It was supposed that the values of the specific conductivity were assumed to be rise in the row NH4Sb4F13, NH4Sb3F10 and (NH4)2Sb3F11 crystals. For this reason (NH4)2Sb3F11 compound can to prove to be superionic conductors.