Synthesis, characterization, and properties of reduced europium molybdates and tungstates

TOC Caption Two new reduced europium containing quaternary oxides, K0.094Eu0.906MoO4 and K0.097Eu0.903WO4, and two previously reported ternary reduced oxides, EuWO4 and EuMoO4, were synthesized via an in situ reduction of Eu3+ to Eu2+ under flux method using Mo, W, and Zn as metal reducing agents. 151Eu Mössbauer spectroscopy was used to analyze the relative Eu2+ and Eu3+ content of the samples.