Ionic and P-Type Electronic Transport in Zircon-Type Ce1?????????Xaxvo4?????????? (A = Ca, Sr)Electronic Supplementary Information (Esi) Available: Oxygen Partial Pressure Dependence of the Total Conductivity and Seebeck Coefficient of Ce0.8Ca0.2Vo4???+????? (Fig. S1) and of the Electron-Hole Mobility in Ce1?????????Xcaxvo4???+????? at 1023 K (Fig. S2). See Http://Www.rsc.org/Suppdata/Jm/B2/B206004C/