Issue 8, 1985

Analysis of the intervalence absorption band edge in the mixed-valency SbIII,V salt Rb2.67SbCl6

Abstract

The variation in the shape of the long-wavelength tail of the intervalence charge-transfer band has been measured in single crystals of the class II SbIII,V mixed-valency compound of Rb2.67SbCl6 from 6 to 310 K. Far-infrared and Raman spectra (50–1000 cm–1) are also reported. The absorption constant is an exponential function of photon energy, i.e. the band edge obeys the Urbach rule. To explain the temperature dependence of the steepness of the exponential band edge it is necessary to include quadratically coupled lattice modes in addition to the linearly coupled intramolecular modes. The mean frequency of this lattice mode is 88(2) cm–1, in the same range as the transverse optic mode (76 cm–1).

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans. 2, 1985,81, 1259-1268

Analysis of the intervalence absorption band edge in the mixed-valency SbIII,V salt Rb2.67SbCl6

K. Prassides and P. Day, J. Chem. Soc., Faraday Trans. 2, 1985, 81, 1259 DOI: 10.1039/F29858101259

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements