CALCULATION OF THE RAMAN FREQUENCIES AS A FUNCTION OF TEMPERATURE IN PHASE III OF NH4I

Kavruk D., YURTSEVEN H. H.

MODERN PHYSICS LETTERS B, cilt.24, sa.8, ss.817-824, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 8
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1142/s0217984910022792
  • Dergi Adı: MODERN PHYSICS LETTERS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.817-824
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We study here the temperature dependence of the Raman frequencies for the overtone 2 nu(6) of the librational mode nu(6) in phase III of NH4I. By using the experimental infrared frequencies of the 2 nu(6) mode, we predict the Raman frequencies of this overtone 2 nu(6) mode as a function of temperature at atmospheric pressure in phase III of NH4I. Our calculations indicate that the Raman frequencies of 2 nu(6) exhibit anomalous behavior at around 110 K (P = 0) in phase III of NH4I, as observed experimentally.