5. Crystallographic applications
The diffractogram of a polycrystalline material makes it possible to determine the parameters of the elemental lattice, often with very high precision. Structural analysis, on the other hand, is difficult to access, although significant progress has been made in recent years.
5.1 Indexing powder diagrams
The positions of the lines in a diffractogram are determined from the dimensions of the elementary crystal lattice. Conversely, knowledge of the crystal lattice is available by examining the powder diagram. In the first phase, for each reflection, the indices ( h, k, ) of the corresponding family of planes are determined from the reciprocal lattice.
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Crystallographic applications
Residual stress measurement. Internal stresses
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