Nanografi Nanotechnology

Holmium(Ho) is the one of the lanthanides element with an atomic number 67. Holmium is a soft, bright, silvery-white rare earth metal which is malleable and ductile. Isolated holmium is stable in dry air at room temperature, but it easily reacts with water and corrodes readily. In addition, holmium burns when temperature of air is heated up forming holmium oxide (Ho 2 O 3 ). In most compounds holmium exists in its trivalent state. Holmium reacts with all halogens. The one who discovered holmium was Swedish chemist Per Theodor Cleve. The discovery was made in 1879, but it was 1911 when Swedish botanic Otto Holmberg isolated pure holmium. The French chemist Paul Lecoq de Boisbaudran could only isolate the holmium oxide in 1886 by fractional precipitation. The name holmium comes from the Greek word “Holmia” meaning the old name of Stockholm. Holmium is very reactive element that it almost not possible to find it as pure. Therefore, as other rare earth metals holmium is found in mineral...

* Holmium element was firstly examined by Swiss chemists Marc Delafontaine and Jacques Louis Soret in 1878 and its chemical symbol is Ho. The name of holmium is derived from the Stockholm which is capital of Sweden. * Holmium Rare Earth Element is a bright, soft and silvery white rare metal and holmium is malleable. * Holmium Rare Earth Element is measured to be slightly toxic. No serious harms in industrial usage have been detected. Holmium does not affect humans in terms of biological role, but Holmium’s salts are able to stimulate metabolism.   Actually, humans typically consume about a milligram of holmium a year. Plants do not readily take up holmium from the soil. Some vegetables have had their holmium content measured, and it amounted to 100 parts per trillion. * In dry air, holmium normally doesn’t react. But in moist air or when holmium is heated, it swiftly oxidizes. As a result holmium creates yellow oxide. * Like many other lanthanide elements, Holmium elemen...