Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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?
  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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook