2008

Magnetic resonanceD 6560 Variable-Temperature 17O NMR Study of Oxygen Motion in the Anionic Conduc-

tor Bi26Mo10O69. — The mechanisms for ionic conduction in Bi26Mo10O69 are charac-terized by variable temperature 17O NMR spectroscopy in the temperature range -238—1000 °C. A new mechanism for the high temperature oxygen conductivity in-volving all the oxygen atoms is proposed. The mechanism includes O2- hops between oxygen sites coordinated to Bi3+ ions, involving intermediate tetrahedra. The tetrahedra undergo very rapid reorientations, mediating the transport process indirectly. — (HOLMES, L.; PENG, L.; HEINMAA, I.; O'DELL, L. A.; SMITH, M. E.; VANNIER, R.-N.; GREY*, C. P.; Chem. Mater. 20 (2008) 11, 3638-3648; Dep. Chem., State Univ. N. Y., Stony Brook, NY 11794, USA; Eng.) — W. Pewestorf

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MoO2-4