Figure 12
The ideal structure of Pr9O16. Anti-phase CD linkages ½〈111〉F are in red (in Pr9O16), the ½〈210〉F linkages are in black and the ½〈211〉F in-phase linkages in the bc plane are in green (in Pr11O20). In both Figs. 12 and 13 the cations are in red, the anions are in blue and the vacancies (□) are in yellow. |