Dense apatite type lanthanumsilicate LSO (La9.33Si6O26) electrolyte and the Al-, Fe- andMg-doped compositions
LASO (La9.83Al1.5Si4.5O26), LFSO (La9.83Fe1.5Si4.5O26), and LMSO (La9.93Mg0.9Si5.1O26) have been prepared and investigated in this work in terms of their oxygen self-diffusion and total conductivity