About: http://webisa.webdatacommons.org/277437162

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	An amorphous hydrated silicate can be expressed by the general formula: x(Ma Ob).y(SiO2).nH2 O, wherein M is a metal such as B, Be, Mg, Ca, Ba, Al, Zn, Ti, Zr and Sn; a is 1 or 2; b is 1, 2 or 3; n>0; x???0; and y???0.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au