Journal Article FZJ-2015-03593

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Atomic structure solution of the complex quasicrystal approximant Al $_{77}$ Rh $_{15}$ Ru $_{8}$ from electron diffraction data

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2014
Wiley-Blackwell Oxford [u.a.]

Acta crystallographica / B 70(6), 999 - 1005 () [10.1107/S2052520614022033]

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Abstract: The crystal structure of the novel Al77Rh15Ru8 phase (which is an approximant of decagonal quasicrystals) was determined using modern direct methods (MDM) applied to automated electron diffraction tomography (ADT) data. The Al77Rh15Ru8 E-phase is orthorhombic [Pbma, a = 23.40 (5), b = 16.20 (4) and c = 20.00 (5) Å] and has one of the most complicated intermetallic structures solved solely by electron diffraction methods. Its structural model consists of 78 unique atomic positions in the unit cell (19 Rh/Ru and 59 Al). Precession electron diffraction (PED) patterns and high-resolution electron microscopy (HRTEM) images were used for the validation of the proposed atomic model. The structure of the E-phase is described using hierarchical packing of polyhedra and a single type of tiling in the form of a parallelogram. Based on this description, the structure of the E-phase is compared with that of the [epsilon]6-phase formed in Al-Rh-Ru at close compositions

Classification:

Contributing Institute(s):
  1. Mikrostrukturforschung (PGI-5)
Research Program(s):
  1. 42G - Peter Grünberg-Centre (PG-C) (POF2-42G41) (POF2-42G41)

Appears in the scientific report 2015
Database coverage:
Medline ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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 Record created 2015-06-08, last modified 2024-06-10


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