Reciprocal Lattice Spacings
- Practical Electron Microscopy and Database -
- An Online Book -  

This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.


In the formation of TEM diffraction patterns as shown in Figure 2683, the reciprocal lattice spacing Rhkl, measured as the distance from the origin (O, the location of the directly transmitted beam on the screen) to some diffraction spot (A), is related to the real crystal spacing dhkl, by,

          dhkl =λL/Rhkl -------------------------------- [2683]

          L -- The camera length,
          λ-- The wavelength of the incident electron beam,
          λL -- The camera constant.

relationship between the spacing R and the camera length L for diffraction in a TEM

Figure 2683. The relationship between the reciprocal lattice spacing Rhkl and the camera length L for diffraction in a TEM.




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