Germanium telluride

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Germanium telluride
3D model (Jmol)
ECHA InfoCard 100.031.538
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]
Rhombohedral, hR6
R3m, No. 160
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.[2]

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.[3][4]

Doped germanium telluride is a low temperature superconductor.[5]


  1. ^ R. Tsu; et al. (1968). "Optical and Electrical Properties and Band Structure of GeTe and SnTe". Phys. Rev. 172 (3): 779–788. Bibcode:1968PhRv..172..779T. doi:10.1103/PhysRev.172.779. 
  2. ^ A. I. Lebedev; I. A. Sluchinskaya; V. N. Demin; I. H. Munro (1997). "Influence of Se, Pb and Mn impurities on the ferroelectric phase transition in GeTe studied by EXAFS". Phase Transitions. 60: 67. doi:10.1080/01411599708220051. 
  3. ^ E. I. Givargizov; A.M. Mel'nikova (2002). Growth of Crystals. Birkhäuser. p. 12. ISBN 0-306-18121-5. 
  4. ^ Pawley, G.; Cochran, W.; Cowley, R.; Dolling, G. (1966). "Diatomic Ferroelectrics". Physical Review Letters. 17 (14): 753. Bibcode:1966PhRvL..17..753P. doi:10.1103/PhysRevLett.17.753. 
  5. ^ Hein, R.; Gibson, J.; Mazelsky, R.; Miller, R.; Hulm, J. (1964). "Superconductivity in Germanium Telluride". Physical Review Letters. 12 (12): 320. Bibcode:1964PhRvL..12..320H. doi:10.1103/PhysRevLett.12.320.