The LEC has extensive experience in the determination of molecular structures by X-ray diffraction. Their experience in crystallisation allows them to carry out structural research on compounds that are difficult to crystallise. This line is currently focused on the preparation and characterisation of new pharmaceutical cocrystals, as well as on the structural study of pharmaceutical products. Our experience in the characterisation of crystalline samples using X-rays is, in turn, of great use in the characterisation of crystals obtained in other laboratory lines.