DEVELOPMENT OF NEW INSTRUMENTATION AND TECHNIQUES IN X-RAY DIFFRACTION.

This Project had as its original objectives the development of new instrumentation and techniques in x-ray diffraction and the improvement of existing techniques in that field. Early work on the Project was concentrated on instrumentation for x-rays, including a microcamera and monochromator. In recent years emphasis was shifted to, or was concentrated on, the development of low-temperature x-ray diffraction methods and on studies carried out at low temperatures. Simple and convenient techniques for x-ray single crystal and powder studies at low temperatures, developed on this Project, are now widely used. The crystal structures of various liquids and gases were studied at low temperatures, and detailed analyses were made of low-temperature phase transformation in various organic crystals.