“…The incorporation of rare-earth ions into A and/or B sites is an issue of interest in perovskite oxides titanates (García-Zaldívar et al , 1997; Buscaglia et al , 2000, 2002, 2004; Peláiz-Barranco et al , 2009, 2010, 2012; Mackie et al , 2010; Mendez-González et al , 2010, 2014). Previous studies, in BT ceramics, have shown that Ba 2+ can be substituted by La 3+ and Pr 3+ ions, while fractional occupancy of Gd 3+ and Tb 3+ at the B site has been predicted (Buscaglia et al , 2000).…”