HIGH-PRESSURE-CELL FOR NEUTRON-DIFFRACTION INVESTIGATIONS

The design of a titanium-zirconium clamped cylinder-piston type pressu re cell for neutron diffraction investigations under hydrostatic press ure up to 10 kbars without supports is described. It is the first time that Freon-11 has been used as a hydrostatic pressure transmitting me dium. The following results carried out at the room temperature are pr esented: the discovery of the transition from I to III phase in a LiKS O4 single crystal and the results of the investigation on the influenc e of pressure upon the structure of the YBaCuO HTSC obtained by means of the powder diffraction method.