Analysis of heat capacity and Mössbauer data for LuZnSn₂ compound

New analysis of heat capacity data is presented for LuZnSn₂ compound that takes into account anharmonic effects together with the existence of Einstein modes. ^119mSn Mössbauer spectroscopy was used to monitor the hyperfine parameters at the two crystallographically inequivalent Sn sites in the studied compound. The problem of non-unique mathematical resonance spectrum description and the problem how to choose physically meaningful set of hyperfine parameters will be thoroughly discussed. Measured quadrupole interaction constants by ^119mSn Mössbauer spectroscopy give estimations for V_zz component of electric field gradient tensor at both Sn sites in LuZnSn₂.