Tungsten trioxide – Properties and Applications |
What is Tungstentrioxide? Tungsten Trioxide is a powdery triclinic crystal in a light yellow color. If the temperature rises above 740degC it becomes orange tetragonal polycrystalline crystals that return to its original state upon cooling. It is stable when in air with a melting and boiling point above 1750degC. Tungsten trioxide, the most stable type of tungsten dioxide, is a solid. It is not soluble with water or other inorganic acid except hydrofluoric. It can be dissolved into a hot, con