Assertion: metal's oxide | /r/HasProperty | geo
Facets:
Source sentences:
text: The oxide GeO 2 is polymeric, amphoteric, and a glass former.
text: The common oxide of germanium (GeO 2 ) is amphoteric.
text: Germanium tetrachloride is either hydrolyzed to the oxide (GeO 2 ) or purified by fractional distillation and then hydrolyzed.