Cobalt principal characteristics

Triammino-cobaltic nitrite is not ionised in solution, so that in this particular ease the principal valency bonds do not show the characteristics at first laid down for them by Werner. If the substance is treated with ammonia, one, two, or even three of the nitro groups may he replaced by ammonia and the following results are obtained. The entrance of one molecule of ammonia causes the compound to become ionised, and in solution one (N02) ion may be detected. A nitro-group has therefore been expelled from the undissociated zone with production of a new compound of formula... 

In the trace-element data, the first principal component accounts for over 50% of the variance. Aluminum and most other elements correlate positively with the first principal component, a pattern consistent with simple dilution (22,23) - in this case, by quartz sand temper. In contrast, the second principal component (accounting for an additional 15% of the variance) represents the heavy mineral sand component (Ti, Hf, Zr), which negatively covaries with cobalt, manganese, antimony, and arsenic. The Qo and Qm clays from the lowlands are broadly similar in composition (Figure 5). The Qc deposit differs significantly, i.e., the low PC2 scores indicate high concentrations of the characteristic of heavy mineral sands (Ti, Hf, Zr). The Qk and Tp samples span range of composition, but are represented by only 2 samples each. 

Electronic Structures of Co(ll) Compounds.12 As already noted, cobalt(n) occurs in a great variety of structural environments because of this the electronic structures and hence the spectral and magnetic properties of the ion are extremely varied. We shall try to mention here each of the principal situations, giving its chief spectral and magnetic characteristics and citing representative cases. 

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