Abstract

High-resolution electron microscopy has had a great impact on solid state chemistry. The possibility it offers of directly imaging the structure of solids has made it an unvaluable complement to conventional diffraction methods. Disorder and extended effects have become accessible to observation, superstructures, structural modulations and microphases can be identified and particles down to nanometer size can be studied. Combined with electron diffraction and x-ray microanalysis it is a powerful tool for phase analysis, giving guidance to synthesis of new compounds. Under certain conditions even chemical reactions can be studied in situ at atomic resolution. Numerous examples in be found in the fields of high-temperature superconductors, zeolites, ferroelectrics and solid state ionics.

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