  In terms of a semi-phenomenological exchange charge model, we have obtained
estimates of parameters of the crystal field and parameters of the
electron-deformation interaction in terbium titanate Tb2Ti2O7 with a pyrochlore
structure. The obtained set of parameters has been refined based on the
analysis of spectra of neutron inelastic scattering and Raman light scattering,
field dependences of the forced magnetostriction, and temperature dependences
of elastic constants.
