Low‐Temperature Synthesis of Cubic and Rhombohedral Y 6 WO 12 by a Polymerized Complex Method

Cubic Y 6 WO 12 , which has a defect fluorite‐type structure with disordered cation and anion sublattices, was synthesized for the first time at the low temperature of 600°C by a polymerized complex method. The crystallization process of Y 6 WO 12 from an amorphous precursor has been investigated in detail using TG‐DTA, XRD, and TEM. Above 400°C, the cubic phase began to crystallize upon decomposition of the organic materials in the precursor. The crystallite size of the cubic Y 6 WO 12 increased from about 5 nm at 600°C up to about 35–40 nm at 1000°C. Above 1200°C, the cubic phase transformed to rhombohedral Y 6 WO 12 , which is a stable phase.