Hi. This is a very simple and stupid question: Why is the length of the reciprocal lattice vector ##G_{hkl}## equal to ##2 \pi / d_{hkl}##, where ##d_{hkl}## is the distance between the ##(hkl)## planes. Just like the length of the wave vector ##k## equals ##2 \pi / \lambda##(adsbygoogle = window.adsbygoogle || []).push({});

I remember that you get ##G_{hkl}## by fourier-transforming the real lattice in some way or the other, but I fail to see the big picture. Can somebody explain to me a bit? Charles Kittel's book is almost impossible to read for a beginner.

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# Reciprocal lattice vector

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