Germanium telluride

Germanium telluride

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Identifiers
CAS Number	12025-39-7 Y
ChemSpider	74888 Y
Jmol 3D model	Interactive image
PubChem	16213264
InChI 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
Chemical formula	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
Crystal structure	Rhombohedral, hR6
Space group	R3m, No. 160
Vapor pressure	{{{value}}}
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).
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Infobox references

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 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.