X-ray Techniques – Oxford Diffraction Xcalibur PX Ultra


Available Methods and Accessories

The Xcalibur is equipped with a fine focus Copper X-ray tube and a high-speed Onyx CCD 2D detector to collect high-quality diffraction data. The 4-circle kappa goniometer allows easy crystal mounting and alignment. It is optimized for macromolecular single crystal studies but is equally useful in examining bulk structure in materials such as fibers or films. It is also helpful in determining single crystal orientation

Sample Requirements

Crystalline and semi-crystalline materials:

  • Liquids and gel: ~200 µL
  • Powders: 50 – 500 mg
  • Thin films: ~20 x 20 mm with thickness < 1mm

Summary of Technique

WAXS is the most widely used technique to determine the atomic and molecular structure of a crystalline or semi-crystalline material, and it is essentially analogous to X-ray diffraction.

This instrument is mainly used for WAXS scans in transmission geometry, where an X-ray beam passes through a thin sample, and the diffraction patterns are collected on an area detector.  The 2D WAXS frames can provide a quick overview of the crystallinity, composition, the orientation of the crystal structure, and texture effects.

Information Provided & Detection Limits

Provides information on crystalline structure, phase composition, crystallite size, degree of crystallinity and preferred crystal alignment.


Lab Location and Contact Information

Location: IMS X-ray Laboratory
Lab Manager: Daniela Morales