About: http://webisa.webdatacommons.org/143644185

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	wherein M is a cation, x is generally equal to or greater than 2 since AlO4 tetrahedra are joined only to SiO4 tetrahedra, and n is the cation valence.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com