| http://www.w3.org/ns/prov#value | - group consisting of Fe, Cu, Co, Ni, W, Mo, Ti, Cr, Sn and In, M is a metal selected from the group consisting of Li, Na, K Ag, Cu and Tl, T is a metal selected from the group consisting of Ni, Co, W, Mn, Cr, Fe, V and Ti, the symbols k, q and n denote
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