Abstract
The electrical conductivity σdc of AgBaSc(VO4)2 vanadate crystals with glaserite structure (K3Na(SO4)2 type, sp. gr. P $$\bar {3}$$ m1) has been investigated by impedance spectroscopy in the frequency range of 5–5 × 105 Hz and at temperatures from 505 to 835 K. A jump in the σdc value by a factor of ~2.5 is observed at 700–725 K in the σdc(T) curve, which indicates the existence of a first-order phase transition. The temperature range of the σdc jump coincides with that of the endothermic effect observed in AgBaSc(VO4)2 at ~723 K. The σdc value at 835 K is 7 × 10–5 S/cm. The electrical conductivity mechanism is related to the Ag+ ion transport in the AgBaSc(VO4)2 lattice.
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