Germanium monoxide
GeO,Germanium(II) monoxide.png
IUPAC name
germanium(II) oxide
Other names
germanous oxide
germanous acid
3D model (JSmol)
ECHA InfoCard 100.039.914 Edit this at Wikidata
  • InChI=1S/GeO/c1-2
  • [Ge]=O
Molar mass 88.6394 g/mol
−28.8·10−6 cm3/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Germanium monoxide, GeO, is a chemical compound of germanium and oxygen. It can be prepared as a yellow sublimate at 1000 °C by reacting GeO2 with Ge metal. The yellow sublimate turns brown on heating at 650 °C.[1] GeO is not well characterised.[1] It is amphoteric dissolving in acids to form germanium(II) salts and in alkali to form "trihydroxogermanates" or "germanites" containing the Ge(OH)3 ion.[2]


Germanium oxide decomposes to Ge and GeO2.[3]

See also


  1. ^ a b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. ^ Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5
  3. ^ Shriver and Atkins. Inorganic Chemistry (5th Edition). W. H. Freeman and Company, New York, 2010, pp 365.