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22-Apr-2016 11:07

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It is therefore essential to have as much information as possible about the material being dated and to check for possible signs of alteration.Precision is enhanced if measurements are taken on multiple samples from different locations of the rock body.The basic equation of radiometric dating requires that neither the parent nuclide nor the daughter product can enter or leave the material after its formation.The possible confounding effects of contamination of parent and daughter isotopes have to be considered, as do the effects of any loss or gain of such isotopes since the sample was created.

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Another possibility is spontaneous fission into two or more nuclides.

In many cases, the daughter nuclide itself is radioactive, resulting in a decay chain, eventually ending with the formation of a stable (nonradioactive) daughter nuclide; each step in such a chain is characterized by a distinct half-life.