Figure 6: Nuclear density distribution of sodium calculated by the MEM using neutron powder diffraction data.

(Top) Section of nuclear density at z=0.25 for Na0.6[Cr0.6Ti0.4]O2 at 3 K (a), 300 K (b) and 1,073 K (c); (bottom, d) general view of the crystal structure with nuclear density at 1,073 K; (bottom, f) nuclear density distribution along the line connecting ideal Na1 and Na2 sites as a function of temperature. Inset shows the data at high temperature in greater detail.