X-ray crystal structure determination is an important technique for most inorganic and organic chemists. The X-ray Diffraction Laboratory at UM-St. Louis supports the research programs of several research groups in the department. Also, we collaborate with a number of groups elsewhere in the USA and in other countries in their solid-state structure determination research. The Laboratory is equipped with state-of-the-art instrumentation and computational facilities for solid state three dimensional crystal and molecular structure determinations. The facility is located in custom-designed laboratory space in the Center for Nanoscience, opened in November 1996, and currently houses single crystal and powder diffractometers.

For more information please contact Dr. David Osborn at (314) 516-4761 or osborndc@umsl.edu.

Single Crystal X-ray Diffraction Instrumentation

The Bruker SMART CCD (Charge Coupled Device) Area Detector system was recently upgraded with the state-of-the-art 4K CCD APEX II detector and a new Oxfor Cryostream LT system was added for data collection in the range of 80-300K.

The Bruker APEX II Kappa Diffractometer is equipped with an Oxford Cryostream low temperature device.  Fast data collection can be carried out using this Kappa geometry diffractometer equipped with a 4K CCD chip at 110-300K.

Powder Diffraction Instrumentation

The Rigaku Ultima IV X-ray Diffractometer is an advanced and versatile Powder X-ray diffraction system which can be configured in either focused-beam or parallel-beam geometries making possible a variety of analytical methods including powder diffraction, thin film analysis, and small angle X-ray scattering (SAXS)/experiments.  Available detectors include a scintillation counter and a D/tex Ultra (high speed 1-dimensional detector).  A high temperature attachment is also available allowing in-situ measurements at temperatures up to 1500C.

Computer Facilities and Other Instrumentation
The X-ray Laboratory Computing Facility has several workstations running crystallographic software. All computers in the lab are integrated with the university computer network. The Cambridge Structural Database is accessible to all university computer system users and is installed on all teaching and research lab computers.

The preparation laboratory is equipped with stereo microscopes with digital video capabilities for screening and mounting crystals; fume hood, refrigerator and freezer for crystallization and sample storage, together with other necessary facilities for crystallization and crystal handling.