Influence of Ba²⁺ and Pb²⁺ Ions on the Raman Dominating Active Vibronic Mode in Strontium Nitrate Crystals

The composition of Sr(NO₃)₂ crystals grown from an aqueous solution doped with Ba²⁺ and Pb²⁺ were characterized by electron probe microanalysis technique. It was found that Ba²⁺ is enriched in 100 sectors and Pb²⁺ in 111 sectors. Raman spectra of different parts in these crystals at room temperature in the ranges of 1038-1070cm^-1 and 650-1150cm^-1 were investigated. The results indicated that barium and lead shift the Raman dominating peaks to the lower frequency and broaden the full width at half maximum. Furthermore, barium probably degrades the properties of the Sr(NO₃)₂ Raman shifter while lead is anticipated to improve it.