mtz2hkl is intended to facilitate the transition from refmac5 [1] refinement to shelxh or shelxl refinement. At high resolution refinement one often starts with refmac5 [1] and towards the end finishes with shelxh/ shelxl. mtz2hkl is supposed to run with as little user interaction as possible and in the ideal case creates an HKLF 3 or HKLF 4 file from just the filename. The input file should be the mtz-file that refmac5 [1] refines against. To reference this program, please quote T. Grune: "mtz2sca and mtz2hkl: facilitated transition from CCP4 to the SHELX program suite"
upstream has not updated package in 10 years - https://homepage.univie.ac.at/tim.gruene/research/programs/conv/mtz2x/mtz2hkl/index.php
