| http://www.w3.org/ns/prov#value | - D and D' represent one or more cations of the group consisting ofC: Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+, Zn2+ ; D: Al3+, Ga3+, In3+, Ti3+, V3+, Cr3+, Fe3+, Co3+, Ni3+ ; D': Ti4+, Zr4+, Hf4+, Sn4+, Ge4+, Si4+, Nb4+, Ta4+ ; C': Al3+, Ga3+, In3+, Ti3+, V3+, Cr3+, Fe3+, Co3+, Ni3+ and m is a number or fraction thereof between more than 0 and 2, and n is a number or fraction thereof between more than 0
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