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Germanium is sot metal of silvery coloration. It's a component of the fourth group of periodic system, the place it is designated as Ge. It pertains to hint elements. Its atomic weight is seventy two.Fifty nine and particular weight is 5.33 g/cm3. It was invented in 1886 by German scientist. Its identify derived from a reputation of his motherland — Germany. It cannot be met in a pure state. It may possibly only be met as an additive in nickel-tungsten mines, sedimentary rocks, carbone, silicates, turf, thermal water. It can be stored in algaes.

Technical characteristics
Germanium is comparatively brittle metal. It is not uncovered to cold or hot strain working up to a temperature of 550 °C. Surface movie makes it fairly resistant to effect of air, water, salt acid in normal circumstances. It weakly reacts with caustic sodas but will be easily dissolved with chloronitrous acid or alkali answer of hydrogen superoxide. Chemical valency is +2 +4. Chemical compounds with high valence are extra stable. Probably the most incessantly is used dioxide GeO2. .

Bodily properties of Ge
Manufacture

Germanium is obtained by non-ferrous ore processing and out of coal ash. Germanium content material is outlined with a help of emission spectrum evaluation, where it's found by forming of germanium-molybdenum bright-yellow acid. It's smelted by metallurgic method at a temperature of 800−1800°C. To acquire engineering germanium, it should be purified in quartz columns with a help of salt acid by thermal diffusion technique that is intended to do crystallization. Manufacture of single-crystalline germanium used in semi-conducting units specifies by GOST 16 153−80 and technical circumstances.

Software
This metal pertains to semi-conductors which can be used as excessive-frequency single-crystallines for manufacture of transistors, photoconductive resistors, photodiodes, and diodes. There are made Hall units, resistant thermometers, lenses of X-ray spectrum analysis. Excessive-tensile germanium spatter is used in jewellery and dentoprosthetic method. Some alloys on its basis are intended to be used in anticorrosion coverings. Additives of GeO2 dioxide are utilized in alloys, steel mill-products — wire, bar, sheets.

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Pub: 22 Mar 2023 10:35 UTC
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