
%0 Journal Article
%A Ferguson, J 
%A Guggenheim, HJ 
%A Krausz, ER 
%T The weak field representation of the crystal field matrices of <I>d</I><sup>4,6</sup> ions and the electronic absorption spectrum of RbFeF<sub>3</sub>
%J Australian Journal of Chemistry
%D 1969/09/01
%V 22
%N 9
%P 1809-1815
%K 
%R https://doi.org/10.1071/CH9691809
%U https://www.publish.csiro.au/paper/CH9691809 
%X The electronic absorption spectrum of RbFeF3 is reported and analysed by means of crystal field theory. It is shown that the strong field formalism is limited for high spin Fe2+ and the weak field representation should be used to interpret the many triplet states. Published spin-orbit weak field matrices for d4,6 are shown to contain errors. The weak field matrices in the absence of spin-orbit coupling have been derived and they are used to assign the spectrum of RbFeF3. 
