NEW HIGH- AND LOW-TEMPERATURE FACILITIES FOR POWDER DIFFRACTION AT DARESBURY LABORATORY. C.C. Tang, G. Bushnell-Wye, R. J. Cernik, S. M. Clark, CLRC Daresbury Laboratory, Warrington, Cheshire WA4 4AD, United Kingdom

An induction furnace has been constructed to provide a temperature range of 290-2500 K and a cryogenic chamber using a closed-cycled refrigerator has been assembled to cool powder samples from room temperature down to 20 K. The furnace and cryostat are designed as parts of an integrated program to enhance the powder diffraction facilities at the SRS, Daresbury Laboratory. In this work we describe the commissioning of these devices for high resolution powder diffractometry. Powder diffraction results from standard tungsten and silver samples are presented to demonstrate the operation of the apparatus and some of the early experimental results are included.