Germanium CAS 7440-56-4

With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is Germanium which has developed particularly rapidly in recent years. Do you know about Germanium ?

The official answer: Germanium is a chemical element, the element symbol Ge, atomic number 32, atomic weight 72.64, in the periodic table of chemical elements in the 4th cycle, the IVA group. Germanium element is a kind of gray-white quasi-metal, shiny, hard, belongs to the carbon group, chemical properties and the same group of tin and silicon are similar, insoluble in water, hydrochloric acid, dilute caustic alkali solution, soluble in aqua regia, concentrated nitric acid or sulfuric acid, with two sexes, so soluble in molten alkali, peroxide alkali, alkali metal nitrate or carbonate, more stable in the air.
In nature, germanium has a total of five stable nuclides: 70Ge, 72Ge, 73Ge, 74Ge, 76Ge, above 700 ° C with oxygen to generate GeO2, above 1000 ° C with hydrogen, fine powder germanium can burn in chlorine or bromine, germanium is an excellent semiconductor, can be used for high frequency current detection and alternating current rectification, besides, can be used for infrared light materials, precision instruments, catalysts. Compounds of germanium can be used to make fluorescent plates and various glasses with high refractive index.
Germanium , tin and lead are part of the same family in the periodic table , and the latter two were discovered and used by ancient people , while germanium has not been mined on an industrial scale for a long time. This is not due to the small amount of germanium in the earth’s crust, but because it is one of the most dispersed elements in the earth’s crust, and there are very few germanium-containing ores.