1. E. Robinel, B. Carette, and M. Ribes, J. Non-Cryst. Solids 57, 49 (1983).
2. J. Roos, D. Brinkmann, M. Mali, A. Pradel, and M. Ribes, Solid State Ionics 28–30, 710 (1988).
3. Stoe WinXPOW: Powder Diffraction Software, Version 2.21 (Stoe and Cie, Darmstadt, 2007).
4. W. Kraus and G. Nolze, PowderCell for Windows: Powder Pattern Calculation from Single Crystal Data and Refinement of Experimental Curves, Version 2.3 (Federal Institute for Materials Research and Testing, Berlin, 1999).
5. Yu. G. Vlasov, Yu. E. Ermolenko, and B. A. Nikolaev, Elektrokhimiya 17, 1448 (1981).