"http://wiki.answers.com/Q/Is_germanium_a_mineral" No germanium is a metal....
Iron and germanium are both chemical elements on the periodic table. They are both metals and have similar properties such as being solid at room temperature, having high melting and boiling points, and being good conductors of electricity. However, iron is a transition metal and germanium is a metalloid.
For the same reason silicon is, they are both semiconductors and thus can be used to make transistors which can be used to build amplifying circuits.
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It isn't any more. Aside from all the other drawbacks to Germanium (more expensive, noisier, less able to handle high voltages), it becomes "intrinsic" at a fairly low temperature. A pure semiconductor material is called intrinsic, it's also called an insulator. If you put the probes of your ohmmeter in a pail of sand - the material all silicon semiconductors start out life as - the meter will sit there and look at you like "now why did you do that?" To make it do its thing you have to "dope" it with boron or arsenic. Once you spice up your silicon (or germanium, in the case of this thread) with dopants, it's called extrinsic material. Well...what happened is Motorola built a bunch of transistorized car radios with germanium components back in the 1950s, and when the weather got hot the radios all quit working...because at slightly elevated temperatures germanium forgets it's doped.
Potential barrier of silicon is 0.7, whereas potential barrier of germanium is 0.3
Germanium Diodes have a lower forward drop voltage (of 0.3V) compared to more common Silicon Diodes (forward voltage of 0.7V).
Germanium diodes are not very common these days and are hard to find but are still used in hobby AM radio receivers as detectors and also in battery circuits connected to Solar panels.
Very common in guitar pedals.
- Neeraj Sharma
the leakage current of silicon is less when compared with the leakage current of germanium.. hence scr's are made up of silicon than germanium.. hope tis one is useful to u all!- Vignesh.L(engineer, 1st year)
Germanium is a metal that conducts electricity and germanium crystals can be prepared in a manner allowing them to conduct electrify through their crystal lattice is one direction only, making germanium crystals valuable for use in transistors and rectifiers.
In a semiconductor like silicon or germanium, it's possible to control whether the material is a conductor or not. With iron, it's a conductor, and there's no way to control it.
Germanium is not manufactured; its ore is mined then refined into germanium.
The pure element has no odor as it is a solid and nonvolatile.
products made by silicon are more stable than those made by germanium
the valence band energy is different in the two substances,so the cut in voltage is different.