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- Thread starter zorro
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Divide the area density of atoms within a plane by the volume density of atoms in the crystal. This gives the distance between the chosen plane and the nearest parallel plane.

Of course, this still means you need to decide which planes you're measuring the distance between.

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Going that way I got a/2.Divide the area density of atoms within a plane by the volume density of atoms in the crystal. This gives the distance between the chosen plane and the nearest parallel plane.

a/√3 is the distance between which two planes in a fcc unit cell? Not the nearest ones?Of course, this still means you need to decide which planes you're measuring the distance between.

- #4

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Generally you'll be interested in the planes of greatest density rather than the closest planes. In fact, you can find planes arbitrarily close together, if you pick planes with a very low density.a/√3 is the distance between which two planes in a fcc unit cell? Not the nearest ones?

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(btw I found this distance in the derivation of the height of a hexagonal unit cell)

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It's the distance between planes parallel to the (111) plane.

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(111) = ?

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- #9

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I learned something new there

Thanks!!

Thanks!!

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