A HEATABLE LARGE-VOLUME HIGH-PRESSURE-CELL FOR NEUTRON POWDER DIFFRACTION - THE KIEL-BERLIN CELL-I

A heatable high pressure cell for angle dispersive neutron powder diff raction has been developed. This cell, called Kiel-Berlin Cell I, is o f the piston-cylinder-type and based on a design first introduced by M cWhan. High temperature conditions under high pressure are achieved by a graphite resistance heater surrounding the sample container. The ce ll operates up to temperatures of 700 K and pressures of 1.5 GPa, simu ltaneously. We report the design of the cell along with calibration da ta. We also give a brief and representative account of pressure-temper ature-dependent studies in which the present cell was used. (C) 1997 A merican Institute of Physics.