Article | REF: P1076 V1

X-ray crystal structure determination: numerical methods

Author: Yves JEANNIN

Publication date: April 10, 1996

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3. Steps in crystal structure determination

Structure resolution: sequence of operations
  • Processing of raw experimental data and calculation of structure factor moduli with their standard deviation.

  • Data analysis and space group search based on systematic extinctions.

  • First empirical absorption correction with assumed mesh content.

  • First search for the structure using direct methods and/or Patterson's function.

  • Alternating cycles of least-squares refinement and Fourier series to identify all atoms and refine their coordinates.

  • Fourier series difference and verification that all atoms in the mesh, including solvent molecules, are taken into account.

  • New absorption correction...

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Steps in crystal structure determination