Mössbauer effect study of monoclinic Fe2TiO5

Abstract The spectra of 57 Fe in monoclinic Fe 2 TiO 5 were interpreted as hyperfine patterns belonging to two nonidentical iron sites. They confirm that Fe 3+ ions are distributed over 4a and 8f sites. The spectra of mosaic-like crystals indicate that all iron spins lie in the (100) plane. The temperature dependences of hf parameters gave a magnetic ordering temperature 350 K, average saturation effective field 505 kG and Debye temperature 430 K. Above 1500 K, monoclinic Fe 2 TiO 5 transformed into the stable pseudobrookite form.