Schwingungsspektren und Kraftkonstanten der Elpasolithe Cs2KMF6 (M = Sc,Y, La,Gd, Yb)

Vibrational Spectra and Force Constants of the Elpasolites Cs₂KMF₆ (M = Sc, Y, La, Gd, Yb) The vibrational spectra of the elpasolites Cs₂KMF₆ (M = Sc, Y, La, Gd, Yb) have been recorded and assigned including the lattice vibrations. The vibrational frequencies thus obtained were used for the calculation of XVFF force constants. The values of the stretching force constants are discussed.