Luminescence and EPR studies on strontium carbonate obtained by thermal decomposition of strontium oxalate
1986; Elsevier BV; Volume: 47; Issue: 4 Linguagem: Inglês
10.1016/0022-3697(86)90032-6
ISSN1879-2553
AutoresS. Angelov, Radostina Stoyanova, R. Dafinova, K. Kabasanov,
Tópico(s)Luminescence and Fluorescent Materials
ResumoStrontium carbonate with self-activated luminescence in the short-wave length region λmax = 490 nm is obtained by thermal decomposition of pure SrC2O4· H2O at 530°C. By means of EPR, CO2− radicals are found in the luminescent strontium carbonate, which are stabilized in anion sites and interstitial positions of the lattice. The presence of these pairs directly confirms the oxalate decomposition mechanism proposed by Boldyrev. The CO2− radicals in the interstitials of the aragonite lattice of SrCO3 are most probably responsible for the self-activated luminescence.
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