Multi-platform software has been developed for the analysis of powder diffraction data, with particular focus on structure solution. The program provides a Rietveld optimization engine, with the possibility of refining parameters describing both the sample and the instrument model. Geometric constraints such as rigid fragments and torsion angles can be defined for the atomic structure, to reduce the number of degrees of freedom of the model. An innovative hierarchical description of the asymmetric unit has been adopted, which allows, in principle, the definition of arbitrarily complex geometric relationships. Additionally, global optimization algorithms may be used in place of the standard nonlinear least squares, when particularly challenging problems are being faced.

ReX: a computer program for structural analysis using powder diffraction data / Bortolotti, Mauro; Lutterotti, Luca; Lonardelli, Ivan. - In: JOURNAL OF APPLIED CRYSTALLOGRAPHY. - ISSN 0021-8898. - STAMPA. - 42:(2009), pp. 538-539. [10.1107/S0021889809008309]

ReX: a computer program for structural analysis using powder diffraction data

Bortolotti, Mauro;Lutterotti, Luca;Lonardelli, Ivan
2009-01-01

Abstract

Multi-platform software has been developed for the analysis of powder diffraction data, with particular focus on structure solution. The program provides a Rietveld optimization engine, with the possibility of refining parameters describing both the sample and the instrument model. Geometric constraints such as rigid fragments and torsion angles can be defined for the atomic structure, to reduce the number of degrees of freedom of the model. An innovative hierarchical description of the asymmetric unit has been adopted, which allows, in principle, the definition of arbitrarily complex geometric relationships. Additionally, global optimization algorithms may be used in place of the standard nonlinear least squares, when particularly challenging problems are being faced.
2009
Bortolotti, Mauro; Lutterotti, Luca; Lonardelli, Ivan
ReX: a computer program for structural analysis using powder diffraction data / Bortolotti, Mauro; Lutterotti, Luca; Lonardelli, Ivan. - In: JOURNAL OF APPLIED CRYSTALLOGRAPHY. - ISSN 0021-8898. - STAMPA. - 42:(2009), pp. 538-539. [10.1107/S0021889809008309]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/90984
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