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Laue method for determining orientation

  1. Feb 7, 2009 #1
    I have just seen a photograph known as a Laue photograph. I am reading about the Laue method of X-ray Diffraction. This method is supposed to be useful for determining the orientation of a crystal, according to Ashcroft. My question is how? Orientation with regards to what? It seems to me the concept of orientation is a bit trivial, unless you define a reference or axis, so how is this method helpful?
    Thanks.
     
  2. jcsd
  3. Feb 9, 2009 #2
    The diffraction pattern will allow you to determine the crystalline axis, a,b, and c.
     
  4. Feb 13, 2009 #3
    You can determine the orientation of the crystal axes relative to the specific sample shape.
    You can have a thin silicon disc (wafer) and want to know which crystal direction is perpendicular to the face, for example. It can be 100 or 111 etc.
     
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