Assertion: ore's iron | /r/AtLocation | small quantities
Facets:
value: for a few limited purposes
type: PURPOSE
value: by reducing the pure oxide
type: MANNER
Source sentences:
text: For a few limited purposes when it is needed, pure iron is produced in the laboratory in small quantities by reducing the pure oxide or hydroxide with hydrogen, or forming iron pentacarbonyl and heating it to 250 °C so that it decomposes to form pure iron powder.