A-site ordered quadruple perovskite oxides
Long Youwen1, 2, †,
       

Mössbauer spectra of LaCu3Fe4O12 at (a) 4.2 K, (b) 298 K, and (c) 423 K. Arrows in panel (c) show spectral features due to a small amount of α-Fe2O3 impurity.[31]