The solid-state thermal decompositions of the decacyano-dicobaltate(II) and decacyano-µ-superoxo-dicobaltate(III) ions studied by electron paramagnetic resonance

1969 ◽  
Vol 0 (12) ◽  
pp. 650-651 ◽  
Author(s):  
B. M. Chadwick ◽  
L. Shields
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Solid State ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

MAS NMR and EPR study of structural changes in talc and montmorillonite induced by grinding

Clay Minerals ◽  
2016 ◽  
Vol 51 (1) ◽  
pp. 69-80 ◽  
Author(s):  
Roger Borges ◽  
Lívia Macedo Dutra ◽  
Andersson Barison ◽  
Fernando Wypych
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Electron Paramagnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Cation Exchange ◽  
Structural Changes ◽  
Environmental Changes ◽  
Milling Process ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

AbstractThe milling process in the solid-state 2:1 clay minerals, montmorillonite and talc, which have different cation exchange capacities, is reported here. Several instrumental techniques were used to monitor systematically the products formed. The dehydroxylation/amorphization of the montmorillonite and talc structures occurs within 3 and 6 h of milling, respectively. Electron paramagnetic resonance spectra indicated that structural Mn2+ was oxidized more quickly in the montmorillonite structure than in talc, while the paramagnetic defects increased during milling. Nuclear magnetic resonance was also used to monitor the environmental changes for Si and Al during milling.

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