Germanium telluride
Synonym(s):Germanium monotelluride;Germanium(II) telluride;Germanous telluride
- CAS NO.:12025-39-7
- Empirical Formula: GeTe
- Molecular Weight: 200.24
- MDL number: MFCD00135541
- EINECS: 234-706-7
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:26:40
What is Germanium telluride?
Chemical properties
Germanium telluride (GeTe) is an efficient semiconductor of germanium and tellurium and is a phase-change material. It is known to exhibit four different structural states: three at room-temperature (one amorphous and two crystalline, α and γ) and one at high temperature (crystalline, β ). It shows semimetallic conduction and ferroelectric behaviour.
The Uses of Germanium telluride
Germanium telluride (GeTe) is a promising material for thermoelectric applications. Nanostructuring; non-stoichiometric defects; doping and alloying with other materials further enhances its thermoelectric performance.
GeTe is also an important semiconductor material prototypical phase change material of high interest for applications in optical and electronic non-volatile memories.
What are the applications of Application
Germanium(II) telluride is a promising thermoelectric doping and alloying compound
What are the applications of Application
Germanium telluride is a promising thermoelectric compound with uses in doping, alloying, and nanostructuring, non-stoichiometric defects. It is also an important semiconductor that can act as a low temperature superconductor when doped. GeTe is also an important semiconductor material prototypical phase change material of high interest for applications in optical and electronic non-volatile memories.
Preparation
Germanium telluride is produced by heating Ge (less resistivity) and Te (99.998%) to their melting points in an evacuated quartz tube. single crystals can be obtained using the zone melting method.
General Description
This product has been enhanced for energy efficiency.
Properties of Germanium telluride
| Melting point: | 725 °C(lit.) |
| Density | 6.14 g/mL at 25 °C(lit.) |
| solubility | insoluble in H2O; soluble in concentrated HNO 3 |
| form | Powder |
| color | Black |
| Specific Gravity | 6.2 |
| Water Solubility | Insoluble in water. |
| Crystal Structure | Cubic, Halite Structure - Space Group Fm3m |
| Exposure limits | ACGIH: TWA 0.1 mg/m3 NIOSH: IDLH 25 mg/m3; TWA 0.1 mg/m3 |
| CAS DataBase Reference | 12025-39-7(CAS DataBase Reference) |
| EPA Substance Registry System | Germanium telluride (GeTe) (12025-39-7) |
Safety information for Germanium telluride
| Signal word | Warning |
| Pictogram(s) |
![]() Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. |
Computed Descriptors for Germanium telluride
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