A new ternary compound with the BGa8Ir4 structure type in the Al–Au–Ir system. Issue 1 (11th February 2019)

• Record Type: Journal Article
• Authors: Kadok, Joris; de Weerd, Marie-Cécile; Boulet, Pascal; Fournée, Vincent; Ledieu, Julian
• Is Part Of: Acta crystallographica. Volume 75:Issue 1(2019:Feb.)
• Page Start: 49
• Page End: 52
• Publication Date: 2019-02-11
• Subjects: intermetallic -- X‐ray diffraction -- crystal structure -- entropy
• DOI: 10.1107/S2052520618016712
• Languages: English
• ISSNs: 2052-5206

Abstract

Abstract : The discovery of a new Al–Au–Ir intermetallic compound is described; its crystal structure resolution is described and the Au/Ir mixed occupancy is discussed. Abstract : Following the recent determination of the Al3 AuIr structure, a new ternary phase has been identified in the Al–Au–Ir phase diagram. It has a chemical composition Al9 (Au;Ir)4 with an apparently low gold content. Its crystal structure has been determined with single‐crystal X‐ray diffraction. The new compound crystallizes in the tetragonal crystal system and has been successfully solved in space group I 41 / acd (Pearson symbol tI 104) with lattice parameters a = 8.6339 (2) and c = 21.8874 (7) Å. Atomic environments are described as well as similarities with the BGa8 Ir4 compound.