Preparation and Characterization of Isostructural Na 2 MoO 4 and Na 2 WO 4 and a Study of the Composition of Their Mixed System.

Na 2 MoO 4 and Na 2 WO 4 are isostructural semiconductors, belonging to the spinel class. They have interesting properties and find applications in numerous sectors. These properties can be tuned by controlling the composition of their solid solutions. Here, different methods to obtain these compounds are presented, both wet and solid-state synthesis. The obtained results show a possible dependence of the material properties on the chosen synthesis method. The pure compounds and their mixtures were characterized by Raman spectroscopy, scanning electron microscopy, and X-ray diffraction.