Assertion: hydrogen | /r/HasProperty | hfo
Facets:
value: in various oxide materials
type: LOCATION
Source sentences:
text: It is also a potential electron donor in various oxide materials, including ZnO, SnO 2 , CdO, MgO, ZrO 2 , HfO 2 , La 2 O 3 , Y 2 O 3 , TiO 2 , SrTiO 3 , LaAlO 3 , SiO 2 , Al 2 O 3 , ZrSiO 4 , HfSiO 4 , and SrZrO 3 .