Germanium telluride Chemical Properties

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

Specific Gravity

6.2

color 

Black

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

Risk Statements 

22

Safety Statements 

36

WGK Germany 

3

TSCA 

Yes

HS Code 

2842901090

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Germanium telluride Usage And Synthesis

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.

Uses

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.

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.

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