Crystal Structure Of Holmium OxideAlthough Holmium dioxide crystals are part of the cubic crystal structure, their structure is complex. Every unit cell is made up many atoms. The lattice constant at 1.06nm is quite large. This structure is typical for the oxides heavy rare earth element elements Tb2O3, Dy2O3,Er2O3, Tam2O3, Tm2O3, Ty2O3, Tm2O3, Tm2O3,, Yb2O3 and Lu2O3. It has 7.4m p thermal expansion coefficient.
History Information on Holmium OxideMarc de la Fontaine & Jacques Luis Sole discovered Holmia in 1878 when they observed an unusual absorption spectrum of an unknown metal. Pell Teodorcliff also discovered the element during the 1878 study of Erbium Oxide. Cliff was able to remove impurities using the method of Carl Gustav Mossander. Two types of impurities are found among them: the brown and the green. He called the brown substance “Holmia” after Stockholm and the “thulia” green substance. He later found out that the materials he separated actually contained holmium oxide as well as thulium,
Holmium OxideManufacturing Process We will briefly describe the process of extracting holmium oxide: crushing minerals and grinding. Repeated use of the electromagnetic beneficiation technique is required to remove the holmium phosphate from the ore. The pH of the acidic filtrate can be partially neutralized by sodium hydroxide, which will give it a pH range between 3-4. Hydroxide will form from the precipitation of thorium. Ammonium oxalate is then used to transform the rare earth salt in to insoluble, oxalate. An annealing process converts the oxalate to oxide. After the oxide has been dissolved in the nitric, the main constituent cerium’s oxide becomes insoluble in the nitric acid. Thus, the cerium can be separated. Ion exchange is the best method to distinguish holmium dioxide from other rare earth elements. You first need to add the rare earthions onto an appropriate ion-exchange resin. Next, you will use a suitable complexing agent like ammonium citrate, or nitrilotriacetic Acid, to wash out any remaining rare earthions.
Holmium Oxide– Application Range The yellow and red colors of Soviet diamonds, and Soviet glass can be enhanced by holmium dioxide. The spectrum has sharp peak absorption values of glass with holmiumoxide and holmiumoxid solution (usually perchloric acids solution). These glasses can be used for calibration purposes and they have been commercially produced. Homium oxide can also be used, as with other rare earth element elements, to make a laser material, special catalyst and phosphor. A holmium laser can emit pulsed light or continuous light and has a wavelength approximately 2.08m. It is non-harmful to the eye and can be used for medical, optical radar, wind speed measuring, atmospheric monitoring and medicine. Advanc3dmaterials advanced materials Tech Co., Ltd. is a professional in holmium dioxide with over 12 year experience in chemical product research and development. Send us an inquiry if you’re looking for high quality Holmium Oxide.