Fission, uneven

As a consequence, the droplet breaks up into a stream of smaller droplets, each one continuing to shrink by evaporation until the Rayleigh stability limit is reached again. The process of droplet fission is repeated several times and it is called uneven fission or droplet jet fission [5,6],... 

Relatively little work has been carried out on fission track dating of phosphate minerals other than apatite, and merrillite, P-Ca3(P04)2, is the only other example to have received any significant attention. Two early studies examined the potential of monazite, (Ce,La,Y,Th)P04, and pyromorphite Pb5(P04)3Cl, but these minerals have not been studied further. Pyromorphite was shown by Haack (1973) to contain numerous spontaneous fission tracks, but these were very unevenly distributed, making its use in dating very difficult. 

At this critical radius, the charged droplet becomes unstable. It has been experimentally observed that the droplets undergo an uneven fission [29] when they are close to the Rayleigh limit. 

The second type of bond breaking involves the uneven breaking of a covalent bond. In heterolytic fission the more electronegative atom takes both the electrons in the covalent bond. Again we can use hydrogen chloride to illustrate this (Figure 14.23). 

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