Find min radius to fit in BCC/FCC

by JohnsonT
Tags: bcc or fcc, radius
JohnsonT is offline
Aug31-07, 12:34 PM
P: 1
What is the min radius of an atom that will just fit into the tetrahedral site in FCC Nickel?
Octahedral site of BCC FE?

I don't really understand what the question is asking. How do I find the size of those site? What does it mean by saying min radius that fit?
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