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Worked example - Finding out the unit cell formed from density

In this worked example we figure out how we can calculate the kind of unit cell that is formed by a metal when its density is known. Created by Shahzad Karim.

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  • aqualine ultimate style avatar for user Strange Quark
    I know this is overly idealised and might not work in the real world, but what if for questions like this, we just determine the geometry of the unit cell by finding out the relationship between the atomic radius and the cell edge length.
    if r/a=1/2 then it's a primitive cube
    if r/a=sqrt(2)/4 then it's FCC
    if r/a=sqrt(3)/4 then it's bcc
    instead of going through calculating it using density
    (1 vote)
    Default Khan Academy avatar avatar for user

Video transcript