About: http://webisa.webdatacommons.org/134904841

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 beta-aluminas are solid compounds, of the general formula M2 O, xAl2 O3, wherein M is an alkali metal and x is a number between 5 and 11.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com