Cation distribution in substituted lithium ferrite

Cation Distribution in Ordered Spinels of the Li2O–TiO2–Fe2O3System

“…The widely accepted model of site distribution of the spinel solid solution system with the general formula (Fe \V Li V ) (Fe \V Li Ti V ) O was already derived by Blasse and later confirmed by Nogue`s et al (5,7). However, this formula is only valid from stoichiometrical and structural reasons for compounds with x41.50 which crystallize in the space group Fd3 m, where all octahedral (16d) sites are symmetrically equivalent.…”

“…Therefore, we extracted those calculated sets of solutions (Eqs. [7]- [13]) with the maximum possible Ti> content on octahedral sites and we present them in Fig. 11.…”

“…[7]- [13]) are independent of each other. Consequently, two of the nine unknown NH G remain undetermined and must be treated as variables (we have chosen NB $ > and NA $ > ).…”

“…All other site occupancy multipliers were then calculated using Eqs. [7]- [13]. Physically insignificant sets of solutions, characterized by one or more negative values of any site occupancy multiplier were then eliminated.…”

“…Because of the linear dependancy of Eqs. [7]- [15] the site occupancy multipliers NB $ > and NA $ > must be treated as variables and were varied between zero and the value for full occupancy.…”