Measurements were made of the ionic conductivity of single crystals along various crystallographic directions. Differing behaviors of the conductivity of these isostructural crystals were attributed to a jump in the conductivity, during the transition to the super-ionic phase of Li3Sc2(PO4)3, and its absence in Li3Fe2(PO4)4. There was also an effect of the existence of a conductivity maximum in different crystallographic directions in the 2 materials: along the c-axis in Li3Sc2(PO4)3 and along the a-axis in Li3Fe2(PO4)4.

A.K.Ivanov-Shits: Fizika Tverdogo Tela, 1997, 39[1], 83-6 (Physics of the Solid State, 1997, 39[1], 72-4)