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Twinning: Difference between revisions
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== Solution of twinned structures by experimental phasing == | |||
== Solution == | |||
[http://dx.doi.org/10.1107/S0108767387099951 Yates & Rees, Acta Cryst. (1987). A43, 30-36] give a method for solving a twinned structure using MIR. This requires four independent derivatives. | [http://dx.doi.org/10.1107/S0108767387099951 Yates & Rees, Acta Cryst. (1987). A43, 30-36] give a method for solving a twinned structure using MIR. This requires four independent derivatives. | ||
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# Some reflections are sharp, others split. | # Some reflections are sharp, others split. | ||
# K = mean(Fo^2)/mean(Fc^2) is systematically high for reflections with low intensity. This may also indicate a wrong choice of space group in the absence of twinning. | # K = mean(Fo^2)/mean(Fc^2) is systematically high for reflections with low intensity. This may also indicate a wrong choice of space group in the absence of twinning. | ||
== References == | == References == | ||