| http://www.w3.org/ns/prov#value | - wherein M is a metallic element of selected from groups 3 to 15 of the periodic table; X is one or more members selected from the group consisting of alkyl, alkoxy, acyloxy, hydroxy and halogen atoms; O is oxygen and n and m are each an integer wherein n+2m is the valence of the metallic element, its polymers and solutions thereof.
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