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PhaseDiff

# PhaseDiff - d(h,k a A a/h a xa xa Unitcellside=a =(h,k =xa...

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Path Length and Phase Differences _____________________________________________________________________________________________________________________ Unit cell side = a Set of diffraction planes = (h,k) New atom in unit cell at position = xa Path length difference for rays reflecting from old and new planes = δ _____________________________________________________________________________________________________________________ for large : d 2 = a 2 h 2 -A 2 _____________________________________________________________________________________________________________________ for small : δ 2 = x 2 a 2 - α 2 _____________________________________________________________________________________________________________________ α = xa sin φ A = a h sin φ _____________________________________________________________________________________________________________________ δ 2 = x 2 a 2 (1 - sin 2 θ ) d 2 = a
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