Journal:Acta Cryst D:S2059798320011869
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*<scene name='86/860390/Cv/9'>Pentamer of tetramers</scene>. | *<scene name='86/860390/Cv/9'>Pentamer of tetramers</scene>. | ||
*<scene name='86/860390/Cv/11'>One of the tetramers</scene>. | *<scene name='86/860390/Cv/11'>One of the tetramers</scene>. | ||
| - | In the lattice-translocation defect crystals, every other layer is either in the Fig. 5b orientation (see static image below) or in the Fig. 5d orientation, and the choice is absolutely random. | + | In the lattice-translocation defect crystals, every other layer is either in the Fig. 5b orientation (see static image below) or in the Fig. 5d orientation, and the choice is absolutely random. |
[[Image:Figure5bb.png|thumb|390px|left|'''Figure 5''' Pentamer of tetramer stacking in the toad NA crystal. (a, b) Side view of two alternative ways of stacking in the middle layer with a translation of (1/2, 0, 1/2). (c, d) Top view of (a, b).]] | [[Image:Figure5bb.png|thumb|390px|left|'''Figure 5''' Pentamer of tetramer stacking in the toad NA crystal. (a, b) Side view of two alternative ways of stacking in the middle layer with a translation of (1/2, 0, 1/2). (c, d) Top view of (a, b).]] | ||
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This randomness breaks the long-term periodic and forms a local short-term periodic. This appears to be the particle-size broadening (Coppens, 1997)<ref name="Coppens">PMID:25727874</ref>. If the long-term periodic is broken, the diffraction intensity would spread along the reciprocal-space direction of the step function. In this special case, it is the b* direction. With the spread of the reflections, the subsidiary maxima of the neighboring reflections may overlap, which will result in the smear spots, the especial chacteracters of LTD. | This randomness breaks the long-term periodic and forms a local short-term periodic. This appears to be the particle-size broadening (Coppens, 1997)<ref name="Coppens">PMID:25727874</ref>. If the long-term periodic is broken, the diffraction intensity would spread along the reciprocal-space direction of the step function. In this special case, it is the b* direction. With the spread of the reflections, the subsidiary maxima of the neighboring reflections may overlap, which will result in the smear spots, the especial chacteracters of LTD. | ||
In the intensity deconvolution methods, the randomly distributed two different kinds of layers (third in Fig. 6a) were supposed to accumulate into two mosaic domains (fourth in Fig. 6a), which is similar to twining (Dauter & Jaskolski, 2016)<ref name="Dauter">PMID:28132496</ref>. The corrected intensities could be obtained by dividing the observed value by the factor of [(2''k''<sup>2</sup>-2k+1)+2k(1-k)cos(2πh''t''<sub>d</sub>)]. Therefore, LTD problem could be solved. | In the intensity deconvolution methods, the randomly distributed two different kinds of layers (third in Fig. 6a) were supposed to accumulate into two mosaic domains (fourth in Fig. 6a), which is similar to twining (Dauter & Jaskolski, 2016)<ref name="Dauter">PMID:28132496</ref>. The corrected intensities could be obtained by dividing the observed value by the factor of [(2''k''<sup>2</sup>-2k+1)+2k(1-k)cos(2πh''t''<sub>d</sub>)]. Therefore, LTD problem could be solved. | ||
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| + | [[Image:Figure6.png|thumb|390px|left|'''Figure 6''' A lattice-translocation defect model. (a) The lattice has a layer structure with layers (parallel to the ac plane) stacked along the b direction. (b) The particle-size broadening introduced by the finite unit-cell translations.]] | ||
| + | {{Clear}} | ||
<b>References</b><br> | <b>References</b><br> | ||
Revision as of 11:22, 21 September 2020
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