| http://www.w3.org/ns/prov#value | - VSbaMmNnOx where a is 0.5 to 2; M is one or more of Sn, Ti, Fe or Ga; m is 0.05 to 3; N is one or more of: W, Bi, Mo, Li, Mg, P, Zn, Mn, Te, Ge, Nb, Zr, Cr, Al, Cu, Ce or B; n is 0.0 to 0.5; and x is a number determined by the degree of oxidation of each of the other elements.
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