The Kepler tiling as the oldest complex surface structure in history: X-ray structure analysis of a two-dimensional oxide quasicrystal approximant
| Autor: | Stefan Förster, Martin Trautmann, Sumalay Roy, K. Mohseni, Eva Maria Zollner, Holger L. Meyerheim, Wolf Widdra, Florian O. Schumann |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Structure analysis Condensed matter physics Oxide X-ray Quasicrystal 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Kepler Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry 0103 physical sciences Barium titanate Surface structure General Materials Science 010306 general physics 0210 nano-technology |
| Zdroj: | Zeitschrift für Kristallographie - Crystalline Materials. 231:749-755 |
| ISSN: | 2196-7105 2194-4946 |
| Popis: | We have carried out a surface X-ray diffraction (SXRD) analysis of the approximant structure related to the recently discovered two-dimensional dodecagonal oxidic quasicrystal. The structure is characterized by the 32.4.3.4 Archimedean tiling, first described by Kepler in 1619. The tiling network is related to titanium atoms observed as protrusions in scanning tunneling microscopy images. All four titanium atoms within one two-dimensional unit cell (a0=13.1 Å, b0=12.9 Å, γ=90.5°) are surrounded by three oxygen atoms. The TiO3 units are separated by barium atoms. The total stoichiometry is given by Ba4 Ti4 O10. |
| Databáze: | OpenAIRE |
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