Measurements of the electrical conductivity, magnetic susceptibility and thermoelectric power in the liquid In-AgInTe2 system were carried out over wide temperature and composition ranges. A considerable temperature change of the electronic properties in liquid AgInTe2 decreases gradually up to 66.7 mol%In with the addition of In and it becomes extremely small in the In-rich region more than this composition suggesting that the system is rather metallic. This was also confirmed by the fact that the thermoelectric power changes its sign around this composition and indicates a small value in the In-rich region. On the basis of a strong scattering model the bonding nature of the system is discussed using data of the electrical conductivity and the magnetic susceptibility. The result indicates that liquid AgInTe2 exhibits a covalentic character as observed in most of the liquid chalcogenides, and an ionic contribution is rather predominant in the stoichiometric composition range of AgIn3Te2. Furthermore, the comparison of the degree of electron localization is made between liquid AgIn3Te2 and AgTl3Te2 from the present and previously reported experimental results.
(Received February 28, 1987)
Keywords: liquid chalcogenide, liquid semiconductor, electrical conductivity, magnetic susceptibility, thermoelectric power, electron localization
* Department of Chemistry, Faculty of Science, Yamagata University, Yamagata 990, Japan.
** Student of Yamagata University. Now, Graduate Student, Tohoku University, Sendai 980, Japan.