HIGH-PRESSURE NEUTRON-DIFFRACTION USING THE PARIS-EDINBURGH CELL - EXPERIMENTAL POSSIBILITIES AND FUTURE-PROSPECTS

High pressure neutron diffraction using the Paris-Edinburgh cell has a ttracted considerable interest ever since it has been shown that full structural data can be obtained at pressures up to 10 GPa. In this pap er we will focus on the current state of this technique. Specifically, we report on new experimental possibilities concerning: i) access to ''ultrahigh'' pressures beyond 20 GPa, ii) experiments at variable tem peratures down to 100 K, and iii) experiments on single crystals in in elastic neutron scattering. Current attempts to increase the pressure and temperature range are discussed.