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Germanium monosulfide

Germanium monosulfide
Systematic IUPAC name
Germanium(II) sulfide
3D model (JSmol)
ECHA InfoCard 100.031.536
Molar mass 104.69 g·mol−1
Related compounds
Related compounds
Carbon monosulfide

Germanium monoxide
Germanium disulfide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Germanium monosulfide or Germanium(II) sulfide is the chemical compound with the formula GeS. It is a chalcogenide glass and a semiconductor.[citation needed] Germanium sulfide is described as a red-brown powder or black crystals.[1] Germanium(II) sulfide when dry is stable in air, hydrolyzes slowly in moist air but rapidly reacts in water forming Ge(OH)2 and then GeO.[2] It is one of a few sulfides that can be sublimed under vacuum without decomposition.[3]


First made by Winkler by reducing GeS2 with Ge.[2] Other methods include reduction in a stream of H2 gas,[2] or with an excess of H3PO2 followed by vacuum sublimation.[1]


It has a layer structure similar to that of black phosphorus.[1] The Ge-S distances range from 247 to 300 pm.[2] Molecular GeS in the gas phase has a Ge-S bond length of 201.21 pm.[4]


  1. ^ a b c Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. ^ a b c d E. G. Rochow, E. W. Abel ,1973, The Chemistry of Germanium Tin and Lead, Pergamon Press, ISBN 0-08-018854-0
  3. ^ Michael Binnewies, Robert Glaum, Marcus Schmidt, Peer Schmidt, 2012, Chemical Vapor Transport Reactions, De Gruyter, ISBN 978-3-11-025464-8
  4. ^ Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.