Holmium Oxide (Ho2O3) Powder
Holmium oxide (Ho2O3), also known as Holmia, is an important rare earth oxide. Similar t other rare earth oxides, the crystal structure of Ho2O3 is cubic. The nanoparticles of Ho2O3 are usually available in powder form in various different particle sizes. The appearance of holmium oxide changes under different lighting conditions; under daylight it is in a pale orange colored powder while under trichromatic light it is an orange-red. The wide bandgap of holmium sesquioxide is around 5 eV. The surface of holmium oxide exhibits surface bifunctional, acid-base properties. This behavior of holmium oxide is utilized to catalyze the dehydration of alkan-2-ols to alkan-1-enes and the oxidative coupling of methane. The optical properties of Ho2O3 are also used as a glass colorant or in glasses to transmit radiation for wavelength-calibration instruments and laser applications.