Abstract: So far, the software used for polycrystalline X-ray diffraction (XRD) refinement to obtain the crystallographic parameters of the material includes Fullprof, Jade, Jana, and Gsas, etc. The above software does not have the single-crystal XRD refinement function. Aiming at this gap, this work builds a single crystal XRD refinement platform based on Labview. On this platform, we first click the folder icon to import the text data of single crystal XRD data, and enter the crystal surface indexes corresponding to the diffraction peaks, then click the calculate button, and the program will automatically find the positions of the diffraction peaks through peak searching. Meanwhile, the lattice constants and zero drift of the single crystal can be calculated automatically, using the Bragg equation, interplanar spacing formula and variance formula, and are finally displayed on the front panel. After repeated trials, the program can run stably and has a high computational efficiency and accuracy, as well as the advantages of easy operation and simple interface.

Key words: XRD, refinement, single crystal, Labview