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could anyone please explain how you go about drawing a reciprocal lattice? For example a 2d rectangular lattice to it's reciprocal form?

Also... I don't know if this is correct but if you have a 2d rectangular lattice with lattice vectors L=n1a1 + n2a2

would the reciprocal lattice vectors be G = h(2pi/a1) + k (2pi/a2) ???

Another question I have is why do fcc's have 4 bases whereas a bcc only has 2? How would you go about calculating the bases vectors of any lattice?

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# I Drawing a reciprocal lattice, also basis

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