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Mendeleev's prediction and history of discovery

Germanium was discovered by Clemens A. Winkler in Freiberg, Germany in 1886. Its existence was predicted by Mendeleev, who found that its atomic weight would be about 71, and that its density would be about 5.5 g / ^cm3. In September 1885, a miner working in the Himmelsurst silver mine near Freiberg encountered an unusual ore. It was handed over to the Academy of Mining, where it was found to be a new mineral. К. Winkler established that the composition of the sample was 75% silver, 18% sulfur and 7% of an unknown substance. By February 1886 it was clear that this was a new metallic element, and exactly the same as Mendeleev had predicted.

Geology

Germanium is found in small amounts in the minerals germanite and argyrodite. They are also present in zinc ores, and commercial production of this metal is done by processing zinc waste flue dust or by-products of the combustion of certain coals.

Technical Characteristics

It is a silver-white brittle semi-metal, non-toxic has no biological significance, and exhibits semiconductor properties. The pure element is usually alloyed with arsenic, gallium or other elements. GeO oxide has a high index of refraction and dispersion. This makes it suitable for use in wide-angle and microscope objective lenses. Germanium is also used as an alloying agent (adding 1% Germanium to silver stops it from tarnishing), in fluorescent lamps and as a catalyst. Evek GmbH offers regbnm germanium/ Price from the manufacturer. Supplier provides prompt delivery of products to any address.

Application

Germanium and its oxide are transparent to infrared radiation and therefore used in infrared spectroscopes. Some germanium compounds are effective as antibacterial agents. This element is used in the form of high-frequency single crystals for making diodes, photoresistors and photodiodes, sensors, X-ray parts, and spectroscopes. The element is also used in jewelry, thanks to its manufacturability. Some germanium alloys also serve as anti-corrosive coatings and solders.

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