27 overheads diffraction methods unit cell scattering

27 overheads diffraction methods unit cell scattering -...

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Determine angle (direction of diffracted beam) from the CENTER of the sphere
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http://www.chembio.uoguelph.ca/educmat/chm729/recip/8ewald.htm
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Reciprocal space Ewald sphere n=1 100 reflection 100 300 200 n=2 200 reflection
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Cullity, pg102 http://www.structuralchemistry.org/teaching/downloads/scm08_11.pdf
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DeGraef, Structure of Materials
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Laue method for xray diffraction transmission mode reflection mode Max von Laue (1879 1960) Elements of xray diffraction , B.D. Cullity and S.R. Stock, p107 http://www.xtal.iqfr.csic.es/Cristalografia/parte_06 en.html
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Laue Geometry The Laue technique is useful for aligning crystals along symmetry axes and for collecting large amounts of data quickly.
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Unformatted text preview: Since the technique uses polychromatic radiation, the Ewald construction must be modified. This can be done in two ways: The first method assumes two Ewald spheres, one for the shortest available and one for the longest. http://capsicum.me.utexas.edu/ChE386K/html/laue_geometry.htm Laue Photograph http://capsicum.me.utexas.edu/ChE386K/html/laue_photograph.htm Rotating crystal method Karl Weissenberg (1893 ‐ 1976) Elements of xray diffraction , B.D. Cullity and S.R. Stock http://www.xtal.iqfr.csic.es/Cristalografia/parte_06 ‐ en.html Rotating crystal method http://www.xtal.iqfr.csic.es/Cristalografia/parte_06 ‐ en.html...
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27 overheads diffraction methods unit cell scattering -...

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