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Figure 7
Electron-density difference between models in the same plane as in Fig. 6[link]: (a) [\Delta\rho = \rho(\hbox{XL-Nb}) - \rho(\hbox{XL-{A}})] and (b) [\Delta\rho = \rho(\hbox{XL-Na}) - \rho(\hbox{XL-Nb})]. Contour intervals are 0.05 e Å−3. Solid and broken lines represent positive and negative contours, respectively. The zero contour is represented by dotted lines.

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