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OCW Scholar - Introduction to Solid State Chemistry 8 Online
OpenStudy (anonymous):

Having trouble with problem set 15, Q1 and 2 (unit cell). In the solutions for Q1 I understand a=cuberoot(2xMr/Naxp) but I don't get how that equals 4/sqrt3 x r. Is it just always 4/sqrt3 x r for BCC unit cells? Similarly for Q2 I don't understand why a=2sqrt 2xr If anyone could help that'd be great!

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