Lattice Vibrations of Solid Solutions; Infrared Absorption Spectra of Nitrate Ions in Alkali Halides

1968 ◽  
Vol 165 (2) ◽  
pp. 359-375 ◽  
Author(s):  
R. Metselaar ◽  
J. Van Der Elsken
Keyword(s):  
Absorption Spectra ◽  
Solid Solutions ◽  
Infrared Absorption ◽  
Alkali Halides ◽  
Lattice Vibrations ◽  
Nitrate Ions ◽  
Infrared Absorption Spectra

The infrared absorption spectra of mixed Ag3[AsO4, VO4] crystals

1979 ◽  
Vol 44 (11) ◽  
pp. 3346-3349 ◽  
Author(s):  
Bohumil Hájek ◽  
Alexander Muck ◽  
Olga Smrčková
Keyword(s):  
Absorption Spectra ◽  
Infrared Absorption ◽  
Factor Group ◽  
Mixed Crystals ◽  
Site Symmetry ◽  
Lattice Vibrations ◽  
Space Group ◽  
Infrared Absorption Spectra ◽  
Effective Site

Mixed Ag3[AsO4, VO4] crystals were prepared over the whole concentration range. In the 0-40% mol. Vanadate concentration range the mixed crystals are isostructural with Ag3AsO4 (T4d, Z = 2). Site- and factor group analyses were carried out for this space group and structure. Above 60 mol% vanadate, the mixed crystals are tetragonal with Ag3VO4 structure. It follows from the behaviour of the ν4AsO3-4 vibration that, in cubic mixed crystals with 40 mol% Ag3VO4, the site-symmetry T is reduced to effective site-symmetry C3 by the effect of lattice vibrations of the T(F) and R(F) types.

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