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Could someone explain how to calculate the probability that two substitutional dopants will reside in adjacent lattice sites.

For example, given a dopant concentration of 5% and a crystal structure in which each lattice site/atom is coordinated to 8 others what is the probability of finding two dopant atoms residing in adjacent lattice sites?

Thanks for any insight!

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# Dopants at adjacent sites. Probability. Solid State Physics.

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