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Ge

Germanium
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13
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14
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15
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31
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32
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33
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49
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50
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51
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Germanium was discovered by Clemens Winkler (Germany) in 1886. The origin of the name comes from the Latin word Germania meaning Germany. It is greyish-white semi-metal. Unaffected by alkalis and most (except nitric) acids. Stable in air and water.
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ENERGIE DI IONIZZAZIONE ED ABBONDANZA |
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Isotopo |
Massa atomica relativa |
Abbondanza (%) |
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70Ge | 69.924250(2) | 21.23(4) |
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72Ge | 71.922076(2) | 27.66(3) |
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73Ge | 72.923459(2) | 7.73(1) |
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74Ge | 73.921178(2) | 35.94(2) |
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76Ge | 75.921403(2) | 7.44(2) |
Germanium is obtained from refining copper, zinc and lead. Widely used in semiconductors. It is a good semiconductor when combined with tiny amounts of phosphorus, arsenic, gallium and antimony. The price of 99.9999 % pure germanium ingot is 1088.10 € for 120 g.
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POTENZIALI DI RIDUZIONE STANDARD |
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Semi-Reazione |
Eo / V |
Annotazione |
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Ge2+ + 2e- Ge(s) |
+0.00 |
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GeO2(s) + 4H+ + 2e- Ge2+ + 2H2O |
- 0.25 |
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GeO2(s) + 4H+ + 4e- Ge + 2H2O |
- 0.01 |
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H2GeO3 + 4H+ + 4e- Ge(s) + 3H2O |
- 0.13 |
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GeO(s) + 2H+ + 2e- Ge(s) + H2O |
- 0.29 |
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