Posted by **bex** on Thursday, April 19, 2007 at 9:53am.

could you please tell me if this is the correct formula for radiometric date

t=1/constant 1n (1+d/p)

many thanks

ps this is a fantastic website

I think that you are after

t=1/ë[ln(1+D/P)]

where:

t = age of the sample

D = number of atoms of the daughter isotope in the sample

P = number of atoms of the parent isotope in the sample

ë = decay constant of the parent isotope

ln = natural logarithm

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