In these cases, the half-life of interest in radiometric dating is usually the longest one in the chain.
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Radiogenic isotope geology 2nd ed.
Principles of certain materials such as a daughter isotopes of radioactive decay into their formulas.
However it is less useful for dating metal or other inorganic objects.
That is the time duration that is used for radiometric dating.
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In short, the process of radioactive decay is immutable under all known conditions.