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Lattice absorption of solid and liquid iodine
Author(s) -
Wagner V.
Publication year - 1972
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.2220500220
Subject(s) - phonon , absorption (acoustics) , lattice (music) , materials science , lattice vibration , radiation , molecular physics , chemistry , condensed matter physics , optics , physics , acoustics , composite material
Abstract The lattice absorption of I 2 single crystals was measured with polarized radiation from 20 to 300 cm −1 at 110 and 300 K. Besides the absorption of the ir‐active phonons there is considerable absorption situated near the inactive internal vibration of the molecule. This absorption is due to two‐phonon processes involving an internal vibrational mode. The corresponding selection rules were deduced. The lattice absorption persists in the liquid phase near the melting point. However, it is altered by strong absorption of the internal vibration.