Lanthanum cuprate, La.sub.2 CuO.sub.4, is a superconductive oxide. In order to prepare a single crystal of lanthanum cuprate, the phase diagram of La.sub.2 O.sub.3 -CuO system is determined utilizing their differential thermal analysis and X-ray diffractometry. Cu oxide and at least one of lanthanum...http://www.google.com.au/patents/US4956334?utm_source=gb-gplus-sharePatent US4956334 - Method for preparing a single crystal of lanthanum cuprate
