Electronic Absorption Spectrum of Rb2MnCl4 Single Crystals

The polarized electronic absorption spectra of Rb2MnCl4 single crystals are studied down to 77 K in the 15 000 to 45 000 cm−1 spectral region. The observed spectral features can be satisfactorily explained by invoking the four-parameter (B, C, Dq, and α) ligand field model which indicates the octahedral site symmetry around the Mn2+ ion. Two higher energy bands are found to be due to double-exciton transitions. Die Polarisationsspektren der elektronischen Absorption von Rb2MnCl4-Einkristallen werden bis herab zu 77 K im Spektralbereich zwischen 1500 bis 45 000 cm−1 untersucht. Die beobachteten Spektren konnen mit einem Vierparameter (B, C, Dq und α)-Ligandenfeldmodell befriedigend erklart werden, das die oktaedrische Platzsymmetrie um das Mn2+-Ion zeigt. Es wird gefunden, das zwei hohere Energiebander durch Doppelanregungsubergange hervorgerufen werden.

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