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Peculiarities in the Vibrational Spectra of Cesium and Rubidium Nitrate Crystals in Its Low‐Temperature Phases
Author(s) -
Karpov S. V.,
Shultin A. A.
Publication year - 1970
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19700390105
Subject(s) - rubidium , caesium , raman spectroscopy , ion , crystal (programming language) , spectral line , nitrate , chemistry , molecule , infrared spectroscopy , absorption spectroscopy , absorption (acoustics) , analytical chemistry (journal) , materials science , inorganic chemistry , potassium , physics , optics , organic chemistry , chromatography , astronomy , computer science , composite material , programming language
Polarized ir absorption spectra of CsNO 3 ‐II and RbNO 3 ‐IV crystals have been investigated in the region of the fundamental vibrations of the nitrate ions at 80 and 300 °K as well as the Raman spectra of these crystals at room temperature. Apart from the local field effects and the Davydov splitting of some vibrational terms also a splitting due to the presence of several sets of molecules not related by symmetry in a unit cell was observed. These results agree with the more accurate data of X‐ray analysis of the crystal structure of the low‐temperature phases of cesium and rubidium nitrate.