Germanium telluride

Germanium telluride (GeTe) is a chemical compound of germanium and tellurium and is a component of chalcogenide glasses. It shows semimetallic conduction and ferroelectric behaviour.

Germanium telluride

Unit cell of germanium telluride.
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.538
PubChem CID
  • InChI=1S/GeTe2/c2-1-3 Y
    Key: GPMBECJIPQBCKI-UHFFFAOYSA-N Y
  • InChI=1/GeTe2/c2-1-3
    Key: GPMBECJIPQBCKI-UHFFFAOYAU
SMILES
  • [Te]=[Ge]=[Te]
Properties
GeTe
Molar mass 200.21 g/mol
Appearance solid
Density 6.14 g/cm3
Melting point 725 °C (1,337 °F; 998 K)
Band gap 0.6 eV
Refractive index (nD)
 5
Structure
Rhombohedral, hR6
Space group
 R3m, No. 160
a = 4.1719 Å, c = 10.710 Å
161.430 Å3
Related compounds
Other anions
 Germanium monoxide
Germanium monosulfide
Germanium monoselenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

Germanium telluride exists in three major crystalline forms, room-temperature α (rhombohedral) and γ (orthorhombic) structures and high-temperature β (cubic, rocksalt-type) phase; α phase being most phase for pure GeTe below the ferroelectric Curie temperature of approximately 670 K.

Doped germanium telluride is a low temperature superconductor.

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