Determination of the Conformation of Acyclic ?,?-Unsaturated Aldehydes and Ketones from Their Infrared and Raman Spectra?Results and Limitations of Model Calculations

1982 ◽  
Vol 21 (8) ◽  
pp. 639-639 ◽  
Author(s):  
Hans-Joachim Oelichmann ◽  
Daniel Bougeard ◽  
Bernhard Schrader
Keyword(s):  
Raman Spectra ◽  
Infrared And Raman Spectra ◽  
Model Calculations ◽  
Unsaturated Aldehydes ◽  
Aldehydes And Ketones

Spectroscopical Investigation of Order-disorder in Some Compounds with Scheelite Structure

1974 ◽  
Vol 29 (5-6) ◽  
pp. 340-346 ◽  
Author(s):  
W. J. Schipper ◽  
G. Blasse
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Short Range ◽  
Infrared And Raman Spectra ◽  
Scheelite Structure ◽  
Crystallographic Order ◽  
Degree Of Order

Infrared and Raman spectra have been measured of scheelites with formula ALnW8O8, ALnMo2O8 (A = Li, Na, K; Ln = La, Y), Y2MWO8 M = Ge, Si), Y2GeMoO8 and the zircon Y2SiMoO8 in order to get information about the crystallographic order. The A+ and Ln3+ ions in the scheelites ALnW2O8 and ALnMo2O8 are probably ordered in layers Ln-Ln-A-A perpendicular to the c-axis. The order is short-range only. The degree of order decreases in the sequence K, Na, Li. The compounds Y2MWO8 and Y2GeMoO8 are not ordered, whereas the Si4+ and Mo6+ ions in Y2SiMoO8 are ordered in alternate layers perpendicular to the c-axis. The use of vibrational spectra for the determination of crystallographic order is discussed.

Determination of the carrier density dependent electron effective mass in InN using infrared and Raman spectra

2012 ◽  
Vol 249 (6) ◽  
pp. 1235-1240 ◽  
Author(s):  
E. Tiras ◽  
M. Tanisli ◽  
N. Balkan ◽  
S. Ardali ◽  
E. Iliopoulos ◽  
...  
Keyword(s):  
Effective Mass ◽  
Raman Spectra ◽  
Carrier Density ◽  
Infrared And Raman Spectra ◽  
Electron Effective Mass ◽  
Density Dependent
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