Inhibierungseffekt von 1,1,4,4-Tetraphenyl-2-tetrazen bei der radikalischen Polymerisation von Styrol

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Etude par RPE de l'Ion NO2−2 dans une apatite nitrée

A calcium phosphate apatite which contains some different nitrogen oxides is studied by the ESR technique. NO^2?₂ ions are evidenced and characterized. They stay in the apatite channels with their OO direction along the channel axis. ESR experiments at different temperatures show that these ions rotate around this axis when the temperature becomes higher than that of liquid nitrogen.     

Einige Gesetzmäßigkeiten der spontanen Umwandlung der Wasserstofform des Montmorillonits in die Aluminium-form

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AMOS and insulator-to-metal transitions

We describe an attempt to use the AMO method for the investigation of insulator metal transitions. One of the main features of the calculation is that it permits an extension of the AMO method to finite temperatures. The ability of the model to account for such transitions is emphasized for the special case of linear antiferromagnetic systems. We discuss possible generalizations by pointing out that there exists a connection with Peierls' model.