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Germanium is produced mainly from sphalerite a zinc ore, but recent work indicates fly ash from coal burning is a rich source.

Once collected the crude germanium ingots are purified by zone refining, a process that mets a cross sectional area of the ingot allowing the impurities to concentrate in the melt while the pure germanium is allowed to resolidify in the cooling material. The melted area is moved along the ingot until the last meted material contains all the impurities

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15y ago
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6mo ago

Germanium can be separated from other materials by a process called zone refining. This involves melting the germanium and then slowly moving a heater along the crystal, causing impurities to migrate towards one end. By repeating this process multiple times, high-purity germanium can be obtained.

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Q: How is germanium separated from other materials found within it?
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Germanium is mostly found in small quantities in various ores such as germanite, argyrodite, and zinc ores. It is also found in coal deposits and used in industrial manufacturing processes. Additionally, germanium can be extracted from fly ash produced by burning coal.


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Germanium is a metalloid element with the atomic number 32 on the periodic table. It is commonly used in the production of semiconductor materials for electronic devices. Germanium was used in early transistors and is still found in some infrared optical equipment today.


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