Direct methods for incommensurately modulated structures. On the applicability of normalized structure factors
| العنوان: | Direct methods for incommensurately modulated structures. On the applicability of normalized structure factors |
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| المؤلفون: | Z.Q. Fu, R. de Gelder, Hai-fu Fan, S. van Smaalen, R. Israel, E. J. W. Lam, P. T. Beurskens |
| المصدر: | ResearcherID Acta Crystallographica Section a : Foundations of Crystallography, 52, 6, pp. 947-954 Acta Crystallographica Section a : Foundations of Crystallography, 52, 947-954 |
| مصطلحات موضوعية: | Distribution (mathematics), Structural Biology, Direct method, Direct methods, Mathematical analysis, Phase (waves), Structure (category theory), Probability distribution, Geometry, Sayre equation, Superspace, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Mathematics |
| الوصف: | The recently defined normalized structure factors for incommensurately modulated structures [Lam, Beurskens & van Smaalen (1993). Acta Cryst. A49, 709-721] have been subjected to extensive tests regarding their applicability in direct methods for phase determination. It is shown that the probability distribution associated with the structure invariants E(-H)E(H')E(H - H'), where a and H' are reciprocal vectors of main and/or satellite reflections, approximately has the same functional form as the Cochran distribution but triplet phase relations are relatively less reliable when satellites are involved. The use of the multidimensional Sayre equation for the determination of phases of satellite reflections [Hao, Liu & Fan (1987). Acta Cryst. A43, 820-824; Fu & Fan (1994). J. Appl. Cryst. 27, 124-127] is not improved by using normalized structure factors instead of ordinary structure factors. |
| وصف الملف: | application/pdf |
| تدمد: | 0108-7673 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b794802cf1cde4f01b6bccc028a4473 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:A1996VV95600013&KeyUID=WOS:A1996VV95600013 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....9b794802cf1cde4f01b6bccc028a4473 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 01087673 |
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