Fig. 8. (a) Electron density of aluminium from quantitative CBED (left) and a periodic plane-wave calculation using the program Wien2k (right). Reprinted from ref. 120 with permission from AAAS. (b) Static deformation density map around a copper atom in Cu2O. Reprinted by permission from Macmillan Publishers Ltd.: Nature, ref. 122, copyright 1999.
