The dataset contains output files (.check format) from CASTEP calculations of phonons in tetragonally distorted NiMnSb. These files are not human-readable, but we also supply input files (.cell and *.param format) that would prompt a new CASTEP run to open and make use of the *.check files. The *.cell files, in particular, may be altered to cause CASTEP to output *.phonon files (containing frequencies and eigendisplacements) at any desired wavevector.

Further instructions are provided in the README_Data file.