TY  - JOUR
AU  - Oleynikov, P.
AU  - Demchenko, L.
AU  - Christensen, J.
AU  - Hovmöller, S.
AU  - Yokosawa, T.
AU  - Döblinger, M.
AU  - Grushko, B.
AU  - Zou, C. M.
TI  - Structure of the pseudodecagonal Al-Co-Ni approximant PD4
JO  - Philosophical magazine  / A
VL  - 86
SN  - 0141-8610
CY  - London [u.a.]
PB  - Taylor and Francis
M1  - PreJuSER-57961
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000234711000030
DO  - DOI:10.1080/14786430500270343
UR  - https://juser.fz-juelich.de/record/57961
ER  -