Title A 2a2a3c superstructure in hexagonal $Ni_{1-x}S$ : a study by means of electron-diffraction and HRTEM Author Lioutas, Ch.B. Manolikas, C. Van Tendeloo, G. van Landuyt, J. Faculty/Department Faculty of Sciences. Physics Publication type article Publication 1993 Amsterdam , 1993 Subject Physics Chemistry Source (journal) Journal of crystal growth. - Amsterdam Volume/pages 126(1993) :2-3 , p. 457-465 ISSN 0022-0248 ISI A1993KH92500029 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract The high temperature phase of Ni1-xS has the NiAs-type structure. The coexistence of two superstructures, ''3a3a3c'' and ''2a2a3c'' with the basic phase is confirmed by means of electron diffraction. The 2a2a3c superstructure is studied by means of electron diffraction and high resolution electron microscopy. A structure model is proposed based on the periodic insertion of stacking faults in the NiAs-type basic structure and the ordering of vacancies in alternate metal-atom layers. Microtwinning in very narrow slabs is found to be a main feature of the 2a2a3c regions and two defect models are discussed. E-info https://repository.uantwerpen.be/docman/iruaauth/f571b6/47f4896.pdf http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1993KH92500029&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1993KH92500029&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1993KH92500029&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle