The effects of Sc and Nb substitution in Sr2FeReO6 double perovskites. A combined study of X­ray powder diffraction and Mössbauer spectroscopyBlanco, Jose Julio; Hernandez, Tomas; Rodriguez-Martinez, Lide M.; Insausti, Maite; Barandiaran, Jose Manuel; Greneche, Jean-Marc; Rojo, Teofilo · Journal of Materials Chemistry · 2001