Kaye, G. W. C. (George William Clarkson), 1880-1941 · London, New York [etc.] Longman's Green, and Co. · leaf 232
ll emitwavelets which are in phase along OP It is necessary toobtain the corresponding conditions for the centre-face atoms(such as D and E), so that their wavelets also shall be inphase with those from the corner atoms. The difference in phase between the wavelets from D and 0 will be (— -J… … Fl8.in2.—Representation of the diffrac-tion of X rays by the atoms at the cornersand face-centres of an elementary cubeof a cubic crystal. 204 X RAYS odd or both even. The same must also hold for K^ andA3. This at once explains why the complete series of valuesof ^1, ^2, and A3 for the Laue spots…
X-rays
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