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Can anyone tell me formula for lattice constants a, b and c in a hexagonal structure?...

Can anyone tell me formula for lattice constants a, b and c in a hexagonal structure? a , b and c are units cell of structure. As we see in cubic structure we have a formula to calculate side a, b and c method known as braggs law. So what should be the method for calculating it in a hexagonal structure. I want to define the XRD (X-Ray diffraction) structure of my crystal.

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Answer #1

I still don't understand what your question is about, but e.g. this paper contains everything about the real and reciprocal lattice of a hexagonal structure (on the first 1.5 pages).

"Unit cell of structure" is not a common term; I think you are referring to the lattice constants, of which graphene has only one, not three.

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