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Topic: X-rays hitting crystals  (Read 949 times)

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Offline Sophia7X

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X-rays hitting crystals
« on: February 10, 2013, 12:17:17 PM »
If you have X-rays of the same λ, and they hit two crystals with the same packing but different atomic radii, the one with the smaller atoms will create a diffraction pattern in which the spacing of the points of coincidence

A. is smaller (answer)
B. is greater
C. is identical

I thought it would be greater, since if you have smaller radii, you will have a smaller lattice constant. And if you have a larger lattice constant, you will have a smaller d (from Bragg's Law, d being distance between atomic planes), unless I am misinterpreting the question.
Entropy happens.

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