[show abstract][hide abstract] ABSTRACT: Databases dedicated to predicted inorganic crystal structures are emerging fast. Possible applications are listed, from identification through the powder diffraction pattern fingerprint, leading to crystal structure determination before estimation of the cell parameters of newly synthesized real compounds, to the prediction of interesting properties of still unknown materials, allowing chemical synthesis efforts to concentrate on definite targets. The limitations of such approaches due, in some cases, to the incompleteness and poor quality of the predictions and to the lack of openly available efficient tools are discussed through examples.
Physical Chemistry Chemical Physics 08/2010; 12(30):8521-30. · 3.83 Impact Factor
[show abstract][hide abstract] ABSTRACT: The fuzzy frontiers between structure determination by powder diffractometry and crystal structure prediction are discussed. The application of a search-match program combined with a database of more than 60 000 predicted powder diffraction patterns is demonstrated. Immediate structure solution (before indexing) is shown to be possible by this method if the discrepancies between the predicted crystal structure cell parameters and the actual ones are < 1 %. Incomplete chemistry of the hypothetical models (missing interstitial cations, water molecules, etc.) is not necessarily a barrier to a successful identification (in spite of inducing large intensity errors), provided the search-match is made with chemical restrictions on the elements present in both the virtual and experimental compounds. (C) 2008 International Centre for Diffraction Data.
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