xray

X-Ray Facility

The LSU Department of Chemistry X-ray Crystallography Facility occupies 450 sq ft on the 6th floor of Choppin Hall. The Facility Manager is Dr. Frank R. Fronczek (ffroncz@lsu.edu). Equipment available for use consists of:

1) A Bruker Kappa Apex-II DUO diffractometer equipped with two X-ray sources. These are a Mo sealed-tube source with Triumph focusing monochromator and an ImuS Cu microfocus source which is particularly well suited for the study of small, weakly scattering crystals and for absolute configuration determination of chiral organics. The diffractometer is also equipped with an Oxford Cryostream 700 cryostat capable of maintaining temperatures in the range 90-400K. Most data are collected at about 100K.

2) A Nonius KappaCCD diffractometer equipped with graphite-monochromated Mo X-ray source. This instrument is also equipped with an Oxford Cryostream model 700.

3) Four computers with complete suites of crystallographic software. Two of the computers have the Windows XP and Windows 7 operating systems, and two have Linux. Software is the Bruker Apex3 suite, which includes diffractometer-control routines, SHELXS, SHELXTL structure solution and refinement programs, and graphics interfaces, also the WinGX software suite for structure solution, refinement and visualization, and the Nonius maXus software. The department also has a site license for the Cambridge Structural Database and associated software for searching and analyzing literature structures.

4) A Zeiss 2000-C stereo zoom polarizing microscope for sample manipulation and crystal mounting. It is equipped with a digital camera and a TV display, which allows others to observe what is seen through the microscope and photography of samples.