It was found that the solid solubility of Li3VO4 in the high-temperature  phase of Li2SO4 was low, whereas the solid solubility of -Li2SO4 in the high-temperature  and  phases of Li3VO4 was higher. The limit of -Li3VO4 solid solution, Li3-xV1-xSxO4, was found at a temperature of 835C and an x-value of 0.3. At temperatures below 500C, the ionic conductivity in the 2-phase region increased when up to 40mol% of Li3VO4 was added. At temperatures above 600C, a small decrease in conductivity was observed. This behavior was considered to be consistent with the so-called paddle-wheel mechanism of ionic mobility.

M.Touboul, A.Elfakir, M.Quarton: Solid State Ionics, 1995, 82[1-2], 61-5