%0 Journal Article
%A Oleynikov, P.
%A Demchenko, L.
%A Christensen, J.
%A Hovmöller, S.
%A Yokosawa, T.
%A Döblinger, M.
%A Grushko, B.
%A Zou, C. M.
%T Structure of the pseudodecagonal Al-Co-Ni approximant PD4
%J Philosophical magazine  / A
%V 86
%@ 0141-8610
%C London [u.a.]
%I Taylor and Francis
%M PreJuSER-57961
%D 2006
%Z Record converted from VDB: 12.11.2012
%X A model for the pseudodecagonal approximant PD4 in the Al-Co-Ni system was deduced from single crystal X-ray diffraction data. The space group is Bbmm with a = 101.3, b = 32.1 and c = 4.1 angstrom. Atomic positions of 133 unique atoms in the unit cell with a reasonable geometry were found by direct methods and the difference Fourier syntheses. The obtained structure model is in good agreement with high-resolution electron microscopy images of PD4. Diffuse scattering observed along the a* direction in the hkl layers with l = 1/2, 3/2 etc. indicates a superstructure with a doubling of the periodicity along the c-axis and a lamellar disorder along the a-axis. If this diffuse scattering is taken into account, c = 8.2 angstrom.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000234711000030
%R 10.1080/14786430500270343
%U https://juser.fz-juelich.de/record/57961