Germanium
MATERIAL OVERVIEW
Characteristics: Shiny, reflective, dark silvery gray metalloid, pure germanium is a 'p-type' semiconductor. Conductivity depends largely on added impurities. Attacked by nitric acid and aqua regia, but stable in water, acids, and alkalies in absence of dissolved oxygen. Low toxicity. Germanium is too brittle and hard to be rolled or drawn.
Germanium is principally used as a semiconductor material for transistors. The first generation of semiconductors were based solely on germanium, then lower-cost silicon was used. Later, silicon-germanium alloys were developed. Due to its optical properties, germanium is used in fiber-optics, infrared optics and in solar cell applications.
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GENERAL PROPERTIES
|
Symbol: |
Ge |
|
Atomic Number: |
32 |
|
Atomic Weight: |
72.59 |
|
Density: |
5.323 gm/cc |
|
Melting Point: |
937.4 oC |
|
Boiling Point: |
2830 oC |
|
Thermal Conductivity: |
0.602 W/cm/K @ 302.93 K |
|
Electrical Resistivity: |
microhm-cm @ 20 oC |
|
Electronegativity: |
1.8 Paulings |
|
Specific Heat: |
0.077 Cal/g/K @ 25 oC |
|
Heat of Vaporization: |
68 K-cal/gm atom at 2830 oC |
|
Heat of Fusion: |
8.3 Cal/gm mole
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TYPICAL ANALYSES - Impurities in ppm
|
Material / Purity: |
5N |
6N |
| Fe | 1.0 | 0.03 |
| Na | 1.0 | 0.002 |
| Si | 2.0 | 0.017 |
GERMANIUM ROD
|
Material |
Purity |
| Germanium Rod .250" | 5N, 6N |
| Germanium Rod .500" | 5N, 6N |
Rod is cut to order and sold by the inch. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional diameters or custom requirements.
GERMANIUM POWDER, PIECES, & INGOT
|
Material |
Purity |
| Germanium Pieces -1mm | 5N, 6N |
| Germanium Pieces 1-5mm | 5N, 6N |
| Germanium Ingot | 5N, 6N |
| Germanium Powder, -60 Mesh | 3N, 5N |
| Germanium Powder, -325 Mesh | 3N, 5N |
Powder, pieces, and ingots are packaged to order and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.
GERMANIUM COMPOUNDS
|
Material |
Purity |
Germanium Oxide GeO2 -325 Mesh  |
5N |
| Germanium Oxide GeO2 -40 Mesh |
5N |
| Germanium Oxide GeO2 Pieces 3-9mm |
5N |
Compounds are packaged to order and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.
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ALLOYS 
