Electron Paramagnetic Resonance Studies of Vanadyl Doped K1.98 (NH4)0.02(C2O4)2.H2O System
The vanadyl doped K1.98 (NH4)0.02(C2O4)2.H2O system is studied at room temperature using Electron Paramagnetic Resonance (EPR) technique. Two distinct interstitial sites for vanadyl ion are found in the potassium oxalate monohydrate crystal grown with 1% ammonium oxalate monohydrate salt. This is confirmed from angular variation of EPR spectra with static magnetic field H in the ac crystal plane. The ammonium ions seem to act as catalyst for vanadyl ions to occupy otherwise more difficult two interstitial sites in the mixed system. The formation of VO [(C2O4)4.H2O] complex is envisaged in our system and relevant ‘g’ and ‘A’ parameters are obtained through EPR studies.
KeywordsEPR Potassium oxalate monohydrate Vanadyl ion Mixed oxalate system
The authors are thankful to Dr. R P Pant of NPL, New Delhi for his help in EPR work.
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