Hydrous Niobia

Titration, 0.001-1 M chlorides no clear affinity series of Group 1 cations 

Titration, 0.01-4 M chlorides no clear affinity series of Group 1 cations [1891]. Apparently, Cs Li at low salt concentration, but Li Cs at higher salt concentrations. 

Titration and competition with Mg (uptake of Mg in the presence of different salts at otherwise the same conditions), 0.01 M chlorides K Na Li [1782]. 

A series of chromatographic silicas, radiotracer Cs Na the selectivity increases when a pore diameter decreases [3179]. This result suggests a size-exclusion effect, which may also be responsible for the cation selectivity in other silicas. 

The coagulation behavior of silica (see [3180,3181]) is very different from that of metal oxides, and the CCC is not directly correlated with the affnity series. 

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