Open Access
Structure determination from powder diffraction data
William I. F. David,Kenneth Shankland,Lynne B. McCusker,Christian Baerlocher +3 more
- 01 Jan 2006
- Vol. 13
397
TL;DR: In this article, a review of structure determination from powder diffraction data is presented, with particular emphasis on algorithmic developments and the successes and limitations of the technique, as well as the potential for the combined use of X-ray and Neutron Diffraction data for structure verification.
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Abstract: Advances made over the past decade in structure determination from powder diffraction data are reviewed with particular emphasis on algorithmic developments and the successes and limitations of the technique. While global optimization methods have been successful in the solution of molecular crystal structures, new methods are required to make the solution of inorganic crystal structures more routine. The use of complementary techniques such as NMR to assist structure solution is discussed and the potential for the combined use of X-ray and neutron diffraction data for structure verification is explored. Structures that have proved difficult to solve from powder diffraction data are reviewed and the limitations of structure determination from powder diffraction data are discussed. Furthermore, the prospects of solving small protein crystal structures over the next decade are assessed.
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Citations
Mechanochemistry: opportunities for new and cleaner synthesis
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Small Angle X-ray Scattering for Nanoparticle Research
TL;DR: This work provides a theoretical foundation for X-ray scattering, considering both form factor and structure factor, as well as the use of correlation functions, which may be used to determine a particle's size, size distribution, shape, and organization into hierarchical structures.
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Whole powder pattern decomposition methods and applications: A retrospection
TL;DR: The genesis of the modern whole powder pattern decomposition methods (the so-called Pawley and Le Bail methods) is detailed and their importance and domains of application are decoded from the most cited papers citing them.
DASH: a program for crystal structure determination from powder diffraction data
William I. F. David,Kenneth Shankland,Jacco van de Streek,Elna Pidcock,W. D. Samuel Motherwell,Jason C. Cole +5 more
TL;DR: DASH as discussed by the authors is a user-friendly graphical-user-interface-driven computer program for solving crystal structures from X-ray powder diffraction data, optimized for molecular structures and includes algorithms for multiple peak fitting, unit-cell indexing and space-group determination.
597
References
The Cambridge Structural Database: a quarter of a million crystal structures and rising
TL;DR: The Cambridge Structural Database now contains data for more than a quarter of a million small-molecule crystal structures, and projections concerning future accession rates indicate that the CSD will contain at least 500,000 crystal structures by the year 2010.
10.5K
DASH: a program for crystal structure determination from powder diffraction data
William I. F. David,Kenneth Shankland,Jacco van de Streek,Elna Pidcock,W. D. Samuel Motherwell,Jason C. Cole +5 more
TL;DR: DASH as discussed by the authors is a user-friendly graphical-user-interface-driven computer program for solving crystal structures from X-ray powder diffraction data, optimized for molecular structures and includes algorithms for multiple peak fitting, unit-cell indexing and space-group determination.
597
Indexing of powder diffraction patterns by iterative use of singular value decomposition
TL;DR: Comparison with three of the most popular indexing programs, namely ITO, DICVOL91 and TREOR90, has shown that the present method as implemented in the program TOPAS is more successful at indexing simulated data.
580
X-Cell: a novel indexing algorithm for routine tasks and difficult cases
TL;DR: X-Cell as discussed by the authors is a novel indexing algorithm that makes explicit use of systematic absences to search for possible indexing solutions from cells with low numbers of calculated reflections to cells with high numbers of reflections.
329