PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Niobium ignites in cold fluorine, and above 200 oC will react exothermically with chlorine, bromine, and halocarbons such as carbon
http://www.w3.org/ns/prov#wasQuotedFrom
  • espi-metals.com