Ag1-xMg1-xR1+x(MoO4)3 Ag+-Conducting NASICON-Like Phases, where R = Al or Sc and 0 ≤ x ≤ 0.5

Ag1-xMg1-xR1+x(MoO4)(3) NASICON-like solid solutions, where R = Al or Sc and 0 <= x <= 0.5, were prepared; their crystal lattice parameters and thermal stabilities were determined. Silver-ion conductivity was measured, and conductivity activation energy values were calculated for various temperature ranges. Above 400 degrees C, Ag1-xMg1-xR1+x(MoO4)(3) phases have ionic conductivities comparable to the conductivities of sodium-ion and lithium-ion NASICON-like conductors. The conductivity increases as the tervalent cation radius increases or the amount of mobile silver ions increases.