Unit cell of germanium telluride.
| |
Identifiers | |
---|---|
3D model (JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.031.538 |
PubChem CID
|
|
CompTox Dashboard (EPA)
|
|
| |
| |
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 [1] |
Refractive index (nD)
|
5 |
Structure | |
Rhombohedral, hR6 | |
R3m, No. 160 | |
a = 4.1719 Å, c = 10.710 Å[2]
| |
Lattice volume (V)
|
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).
|
Germanium telluride (GeTe) is a chemical compound of germanium and tellurium and is a component of chalcogenide glass. It shows semimetallic conduction and ferroelectric behaviour.[3]
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 (746 °F; 397 °C).[4][5]
Doped germanium telluride is a low temperature superconductor.[6]