Reanalyzed EFG temperature dependence for In, Sn, and Tl

Existing experimental data of the nuclear quadrupole interaction frequency (νQ) for indium, tin, and thallium as function of temperature are analyzed as a product of the structural contribution multiplied by a Debye-Waller type factor with a system-specific proportionality constant. For the theoretical calculation of the structural effect the WIEN2k code is applied using the mostly well-known, but reanalyzed lattice parameters as function of temperature. The necessary vibrational amplitudes are reasonably well known from X-ray and Mössbauer spectroscopy data in the case of Sn, for In a partial data set is available, but for Tl the standard Debye-approximation had to be employed. Revised information on the nuclear quadrupole moments obtained from the now available T = 0 νQ frequencies is presented.