About: http://webisa.webdatacommons.org/246583954

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This is attributed to alkali ions such as sodium, potassium, and lithium in the oxides as well as to negative ions and heavy metals.
http://www.w3.org/ns/prov#wasQuotedFrom	circuitstoday.com