New Oxides Showing an Intense Orange Color Based on Fe³⁺ in Trigonal-Bipyramidal Coordination

Abstract

Hexagonal YIn(1-x)Fe(x)O(3) phases have been prepared and characterized. The coordination for the In/Fe site in this structure is trigonal-bipyramidal. The colors of the phases change from yellow to orange to dark red with increasing Fe content. Magnetic measurements confirm high-spin Fe(3+) for all phases.