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Quantitative analysis of crystalline forms

Identification of polymorphs in pharmaceutical products is a leading X-ray diffraction (XRD) application. The detection and quantification of polymorphic contamination is used to improve production efficiency and cost. In the study of different polycrystalline structures, within a drug compound, one polymorph is distinguished from another by a unique powder diffraction pattern associated with that specific crystal structure. Phase analysis can be restricted to qualitative identification only or can be extended to a full quantitative analysis. The analysis is applicable to polymorphs or to multi-component formulations. A special case of this type of analysis is "percentage crystallinity," where the volume percentage crystalline active ingredient to an amorphous filler is measured within a dosage formulation. X-ray diffraction analysis is also employed to study dosage formulations, under a variety of environmental conditions and over time, to characterize the formation of any polymorphs that could adversely affect performance and toxicity.

Graphite and diamond are considered to be polymorphs, which means they are identical in the chemical aspect, but very different when it comes to crystal structure.

Rigaku recommends the following systems:

Single crystal

A benchtop single crystal X-ray diffractometer ideal for self-service crystallography and teaching.

Our most popular diffractometer for chemical crystallography, configured with either single or dual microfocus sealed tube X-ray sources and an extremely low noise direct X-ray detection detector.

A dual-wavelength, extremely high-flux, rotating anode X-ray diffractometer specifically configured for measuring difficult samples as well as providing versatility through multiple wavelengths.

A modern single crystal X-ray diffractometer for structural analysis of small molecule samples configured with microfocus sealed tube technology and a direct X-ray detection detector.

A bespoke, extremely high-flux diffractometer with custom enclosure and the flexibility to utilize both ports of the rotating anode X-ray source.

Small Molecule

User-inspired data collection and data processing software for small molecule and protein crystallography


Advanced state-of-the-art high-resolution XRD system powered by Guidance expert system software

Highly versatile multipurpose X-ray diffractometer with built-in intelligent guidance

New 6th-generation general purpose benchtop XRD system for phase i.d and phase quantification