Crystal structures and sodium/silver distributions within the ionic conductors Na5Ag2Fe3(As2O7)4 and Na2Ag5Fe3(P2O7)4 Eric Quarez; Olivier Mentré; Karim Djellab; Christian Masquelier New Journal of Chemistry, 2010 Crystal structures of new silver ion conductors Ag7Fe3(X2O7)4 (X = P, As) Eric Quarez, Olivier Mentré, Yassine Oumellal, Christian Masquelier New Journal of Chemistry, 2009