Title Crystal-structure of the double-hg-layer copper-oxide superconductor $(Hg,Pr)_{2}Ba_{2}(Y,Ca)Cu_{2}O_{8-\delta}$as a function of doping Author Radaelli, P.G. Marezio, M. Tholence, J.L. Debrion, S. Santoro, A. Huang, Q. Capponi, J.J. Chaillout, C. Krekels, T. Van Tendeloo, G. Faculty/Department Faculty of Sciences. Physics Publication type article Publication 1995 New York, N.Y. , 1995 Subject Physics Chemistry Source (journal) The journal of physics and chemistry of solids. - New York, N.Y. Volume/pages 56(1995) :10 , p. 1471-1478 ISSN 0022-3697 ISI A1995RR95600025 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract The crystal structure of the newly discovered double-Hg-layer copper oxide superconductor (Hg, Pr)(2)Ba-2(Y, Ca)Cu2O8-delta was studied as a function of chemical doping using neutron and electron diffraction and high-resolution transmission electron microscopy (HREM). Rietveld refinements of the structural parameters from neutron powder diffraction data indicate that the oxygen site O3 on the mercury plane is highly defective, being both partially occupied and displaced from the high-symmetry position. The variable concentration of oxygen vacancies partially compensates for the cation doping and, together with the O3 displacement field, makes some of the Hg atoms acquire an unusual pyramidal coordination. HREM images confirm that the structure is of the '2212' type, with very few defects. In some grains, faint superstructure reflections were evidenced by electron diffraction, suggesting that both the oxygen vacancies and the O3 displacement field may order at least on a local scale. E-info https://repository.uantwerpen.be/docman/iruaauth/612ebe/fb74295.pdf http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1995RR95600025&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1995RR95600025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1995RR95600025&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle