How is germanium obtained?
Trace quantities of germanium are found in certain zinc blendes, in sulfidic ores of copper and arsenic, and in coals, the latter possibly a consequence of the concentration of the element by plants of the Carboniferous Period in geologic history. Certain present-day plants are known to concentrate germanium.
Where is germanium naturally found?
Natural abundance They are found in small quantities as the minerals germanite and argyrodite. Germanium minerals are also present in zinc ores, and commercial production of germanium is carried out by processing zinc smelter flue dust. It can also be recovered from the by-products of combustion of certain coals.
Why gold is used in semiconductor?
Gold has played an important role in the electronics sector for decades. It does not corrode or tarnish, unlike other highly conductive metals, such as copper and silver. And it is a soft, pliable material, which can be easily drawn out into narrow wires or plated into thin coatings.
What are properties of gold?
Gold is one of the densest of all metals. It is a good conductor of heat and electricity. It is also soft and the most malleable and ductile of the elements; an ounce (28 grams) can be beaten out to 187 square feet (about 17 square metres) in extremely thin sheets called gold leaf.
What are 4 characteristics of gold?
No Other Metal or Mineral Measures Up to Gold
- Gold conducts heat and electricity.
- Gold is ductile: It can be drawn out into the thinnest wire.
- Gold is highly reflective of heat and light.
- Gold is prized for its beauty.
- Gold is malleable, so it can be flattened into extremely thin sheets.
Is gold toxic to the body?
Pure gold is chemically inert and passes through the human digestive system without being absorbed into the body. Non-edible gold leaf, which is used for gilding, sometimes contains copper, which can be toxic in high doses.