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Abstract
Ionic conduction is evidenced in PbK2LiNb5O15 single crystal using electric impedance measurements. The phase transition is of first order type and it occurs around 640 K as evidenced by a discontinuity accompanied by a hysteresis of about 10 K, and a global hysteresis up to 720 K. The ionic conduction is attributed to Li+ ion mobility through the structural tunnels by a hoping mechanism.
Acknowledgment
This work is supported by France Foreign Ministry under N°AI/MA/07/165.