anisotropy to the S T = 1/2 ground state of 1, as well as an important broadening of the g ⊥ resonance (g-strain). Through careful analysis of these data, and in conjunction with neutron scattering data, this g-strain can be deconvoluted into distributions of the individual spin Hamiltonian parameters ΔJ and |G|. This method of analysis provides simultaneous estimates of the central values and distribution profiles of the spin Hamiltonian parameters, which are shown not to be described by monodisperse values.