External, internal and semi-internal vib
β
Paras N. Prasad; Raoul Kopelman
π
Article
π
1973
π
Elsevier Science
π
English
β 508 KB
A new method to identify the nature of vibrations in molecular crystals as external oi internal is proposed. The criterion is that in isotopic mi..ed crystals of protonaled and ccrresponding perdeuterated compounds, the external motions (phonons) are in the amal,grnation limit, while the internal mo