About: http://webisa.webdatacommons.org/395123941

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	The negative charge on the individual layers is balanced by cations, such as sodium, calcium, and magnesium, which are adsorbed onto both the external and internal surfaces of the clay layers.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com