title: Structures of pseudo-decagonal approximants in Al-Co-Ni.
abstract: Quasi-crystals shocked the crystallographic world when they were reported in 1984. We now know that they are not a rare exception, and can be found in many alloy systems. One of the richer systems for quasi-crystals and their approximants is Al-Co-Ni. A large series of pseudo-decagonal (PD) approximants have been found. Only two of them, PD4 and PD8, have been solved by X-ray crystallography. We report here the structures of PD1, PD2, PD3 and PD5, solved from the limited information that is provided by electron diffraction patterns, unit cell dimensions and high-resolution electron microscopy images.
authors.affiliation: Department of Materials and Environmental Chemistry, Stockholm University, SE 10691 Stockholm, Sweden. sven.hovmoller@mmk.su.se
authors.forename: Sven
authors.initials: S
authors.lastname: Hovmöller
authors.forename: Linus
authors.initials: L
authors.lastname: Hovmöller Zou
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Zou
authors.forename: Benjamin
authors.initials: B
authors.lastname: Grushko
mesh_terms: D000497:Alloys / Q000737:chemistry*; D000535:Aluminum / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D008956:Models, Chemical; D008958:Models, Molecular; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D009532:Nickel / Q000737:chemistry*
chemical_list: D000497:Alloys; D003035:Cobalt; D009532:Nickel; D000535:Aluminum