| http://www.w3.org/ns/prov#value | - nce, and which softness is, for example, from about 0.0 eV (electron volts) to 7 eV and, more specifically, from about 1 eV to 6.1 eV, including for example, ions of Li+(lithium+1 ion), Na+(sodium +1 ion), K+(potassium +1 ion), Mg2+(magnesium +2 ion), Ca2+(calcium +2 ion), Ce4+(cerium +4 ion), Ti4+(titanium +4 ion), Cr3+(chromium +3 ion), Fe3+(iron +3 ion), Co3+(cobalt +3 ion), BF3(boron fluoride)
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