Figure 3
Electron-density maps for Ag3.4In3.7Sb76.4Te16.5 at 545 K depicted with Fo; only positive contours are drawn at intervals of 200 e Å-3. (a) The sawtooth-type modulation function used to describe the displacement of the atom in an asymmetric unit of this three-dimensional crystal is indicated by a solid line. As seen by comparison with map (b) obtained from the Rietveld analysis with a harmonic function, analysis with the sawtooth function provided better results.  [article HTML]

© International Union of Crystallography 2012