The spinel found in this system had a conductivity of 0.045S/cm at 400C (table 29). High-temperature X-ray diffraction revealed a phase transition, from a distorted structure to a cubic structure, at about 300C in Li2MgBr4. The conductivity results suggested that the transitions corresponded to those from low to high conductivity phases. When Li ions were substituted for the Mg ions, the conductivity increased only in the case of the cubic spinel. No appreciable compositional dependence of the conductivity or activation energy for conduction was observed in the case of the distorted structures.

R.Kanno, Y.Takeda, O.Yamamoto, C.Cros, W.Gang, P.Hagenmuller: Journal of the Electrochemical Society, 1986, 133[5], 1052-6

Table 29

Conductivities in the LiBr-MgBr2 System