To rectify this, it is crucial to exclude the long-range force contributions of 2nd-order force constants, akin to the method implemented in CSLD, followed by a refitting of the short-range force constants. Subsequently, the long-range contributions are reincorporated into the shortrange IFCs and the overall IFCs yield a precise phonon dispersion with this long-range correction (LRC). Figure demonstrates the congruence of the harmonic phonon dispersion derived from HiPhive (with NAC and LRC) and that from Phonopy (with NAC) in NaCl. For less ionic (more covalent) crystals, the influence of the NAC term is marginal, as evidenced in BP (see Figure ). We offer users the ability to enable the NAC-LRC correction feature in the workflow if they want to prevent LO-TO splitting in harmonic phonon dispersions. By default, this setting is turned off to conserve computational time due to its negligible impact on anharmonic properties such as CTE and LTC.