For more than thirty years, it has been assumed that tin ions substitute iron ions in the alpha-Fe2O3 lattice when tin ions dissolve in alpha-Fe2O3 due to the similar ionic size of Fe3+ and Sn4+. No experimental evidence has been reported to examine whether or not the substitution model is valid in this system. We first found that tin ions do not substitute iron ions in the solid solution. The Sn4+ ions occupy the empty octahedral holes in the lattice of the alpha-Fe2O3 phase.
|Effective start/end date||01/01/1997 → …|