Abstract

<h2>Acta Crystallographica Section A</h2><h3>Crystal Physics, Diffraction, Theoretical and General Crystallography</h3><h3>0567-7394</h3> <h2>research papers</h2> Volume 29 Part 1 Pages 31-34 January 1973 <h2>A method for direct structure determinations in P 1 and related groups</h2> H. Schenk and J. G. H. de Jong In centrosymmetric symmorphic space groups the correct 2 solution need not be one with the best consistency. In these space groups the correct 2 solution can be found using a new criterion related to the Harker-Kasper inequalities: in which the summations over h and k are restricted to those terms for which | U h |, | U h + k |, | U h - k | are large and | U k | is small. The weights in HKC are consistent with the Harker-Kasper inequalities for T. 31 Acta Cryst. (1973). A29, 31 A Method for Direct Structure Determinations in P1 and Related Space groups BY H. SCHENK AND J. G. H. DE JONG Laboratory for Crystallography, University of Amsterdam, Nieuwe Prinsengracht 126, Amsterdam, The Netherlands (Received 24 July 1972; accepted 13 August 1972) In centrosymmetric symmorphic space groups the correct Y.2 solution need not be one with the best consistency. In these space groups the