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| Germanium |
| Atomic sequence number: 32; element symbol: Ge; one of carbon family elements; its band gap is narrower than that of silicon with semi-conductor of only around 0.7eV; crystal crystal structure is of gem structure; English name: Germanium |
| Atomic weight: 72.6 |
| Density (g/cm3):5.327 |
| Melting point: 952℃ |
| Color: grey |