A comparison is made of the 300 K Raman spectra of some cyclopentadienyl rare earth complexes. The data show no major change in the position of corresponding bands of the series. A detailed study is carried out in the spectral region of 150 cm-l-300 cm-l at 77 K of the samples. Some evidence of electronic Raman effects is presented.
Die Magnetische Suszeptibilit~t von Praseodym-Athylsulfat-Einkristallen wurde ftir die beiden Hauptachsen im Temperaturbereieh yon 4,4 bis 295 ~ durch die Kraft im inhomogenen Magnetfeld gemessen. Aus der Suszeptibilit~t wurden der lineare und quadratische Zeeman-Effekt sowie die Lage der KristalKeldkomponenten ftir den Elektronengrundzustand aH 4 des dreiwertigen Praseodym-Ions bestimmt.
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