Single-crystal Raman spectrum of strontium dichloride hexahydrate and some related materials
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 70, 1967-1977
- https://doi.org/10.1039/f29747001967
Abstract
Single-crystal Raman spectra at liquid nitrogen temperature are reported for SrCl2·6H2O, SrCl2·6D2O and SrBr2·6H2O. The crystals are trigonal and have a unimolecular primitive cell in which water is coordinated to strontium in both terminal and bridging situations. There are two features of particular note in the assignment. (a) It is shown that although all E modes can in principle show LO–TO splitting, the splitting is likely to be small for those modes originating as Raman-active only in the line group of the chain; this is confirmed by observation. (b) The effect of disorder among the set of terminal water molecules is to relax the selection rules governing Sr—O bond stretching in the plane normal to the chain axis. A complete assignment is offered for all three crystals, except in the ν(OH) region.Keywords
This publication has 0 references indexed in Scilit: