| http://www.w3.org/ns/prov#value | - or more element selected from Group IA elements and Group IIIB elements of the periodic table, boron, iron, bismuth, cobalt, nickel and manganese; and 0 is oxygen;a, b, c and d denote the atomic ratios of X, Y, Z and 0, respectively, such that when a=1, 0<b<=100 and 0<=c<=10,and d is a numerical value determined by the degree of oxidation of the other elements, and wherein said modified carrier h
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