An iterative least-squares method for fitting experimental EPR spectra
in the incommensurate phase to numerical multiparameter model spectra
is outlined. The goal of this work is to provide a quantitative and r
eliable method for evaluating spectral simulation in the incommensurat
e phase and extracting the full information from experimental spectra.
The Marquardt algorithm is used as a search procedure for adjusting t
he parameters that determine the simulated model spectra. An example r
elative to the EPR spectrum of Mn2+ in [Mg(H2O)6] SiF6, illustrates th
e application of the programme. Some simulations of EPR spectra in the
multi-soliton regime are also presented.