X-ray diffraction is a basic technique for the study of solid structure, which can provide unique spectral information for the chemical composition and structure arrangement of samples.

Different crystal forms of the same drug may differ significantly in appearance, solubility, melting point, etc., affecting the stability, production, bioavailability, and safety of the drug.

Powder X-ray diffraction, as one of the methods for the study of drug polymorphism, has the advantages of not destroying samples and simple operation, and is the main method for the qualitative and quantitative analysis of drug polymorphism at present.

Powder X-ray diffraction, as one of the methods for the study of drug polymorphism, has the advantages of no sample destruction and simple operation.