Title Crystal structure and magnetic properties of complex oxides $Mg_{4-x}Ni_{x}O_{9}$, $0\leq x\leq4$ Author Tarakina, N.V. Nikulina, E.A. Hadermann, J. Kellerman, D.G. Tyutunnik, A.P. Berger, I.F. Zubkov, V.G. Van Tendeloo, G. Faculty/Department Faculty of Sciences. Physics Publication type article Publication 2007 London , 2007 Subject Physics Chemistry Source (journal) Journal of solid state chemistry. - London Volume/pages 180(2007) :11 , p. 3180-3187 ISSN 0022-4596 ISI 000260636200025 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract In the Mg4−xNixNb2O9 (0x4) system two ranges of solid solution have been found. One of the solid solutions has a corundum-related structure type (space group ); the second one adopts the II-Ni4Nb2O9 structure type (space group Pbcn). The unit cell constants and atomic positions have been determined and refined using neutron powder diffraction data. Electron diffraction and high-resolution transmission electron microscopy (HRTEM) from MgNi3Nb2O9 crystals identify the presence of planar defects and the intergrowth of several (structurally related) phases. The magnetic susceptibility of Mg3NiNb2O9, measured in the temperature range T=2300 K, shows no indications of magnetic ordering at low temperatures, while for MgNi3Nb2O9 there is a magnetic ordering at temperatures below 45.5 K. E-info https://repository.uantwerpen.be/docman/iruaauth/32b18e/4baa9a509ed.pdf http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000260636200025&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000260636200025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000260636200025&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle