Hole Localization in Thallium Nitrate (I)

Abstract

Using the EPR method, an identification of paramagnetic centers formed in TlNO₃ under γ-irradiation at 77 and 300 K is performed. Their spectral characteristics, corresponding to the NO₃ and NO₂ radicals, are determined. The paramagnetic center NO₃ is attributed to the NO₃ (В) radical, which is thermally stable at 77 K. The NO₃ (В) radicals exist in two forms – I and II, which differ by their spatial orientations. The accumulation of paramagnetic centers NO₃ and NO₂ is investigated and so are the optical reflection spectra of polycrystalline TlNO₃ specimens. The final products of radiolysis of thallium nitrate are identified to be the thallium nitrite and peroxonitrite ions.