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PHASON DISORDER [1 record]
Record 1 - internal organization data 2000-06-21
Record 1, English
Record 1, Subject field(s)
- Physics of Solids
Record 1, Main entry term, English
- phason disorder
1, record 1, English, phason%20disorder
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
The X-ray diffraction results, in fact, point to a new form of structural disorder called phason disorder, which is unique to quasicrystals. If one compares a Penrose tiling or a quasiperiodic sequence with a conventional crystal, one sees that the quasiperiodic structures have the ability to generate a new form of disorder during growth: a defect can arise when the wrong kind of unit cell, or line segment, falls in a particular place. A few isolated mistakes will not affect the diffraction properties of an entire sample, but if many such mistakes plague a sample, they will disturb the diffraction patterns. 1, record 1, English, - phason%20disorder
Record 1, French
Record 1, Domaine(s)
- Physique des solides
Record 1, Main entry term, French
- désordre de phase
1, record 1, French, d%C3%A9sordre%20de%20phase
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
En fait, les résultats de la diffraction des rayons X signalent une nouvelle forme de désordre structural nommé désordre de phase, caractéristique des quasi-cristaux. Quand on compare un pavage de Penrose ou une suite quasi périodique à un cristal classique, on observe que les structures quasi périodiques ont la capacité d'engendrer un nouveau type de désordre pendant leur croissance. Un défaut peut naître lorsqu'une cellule unité (ou un segment) de type inadéquat vient se placer dans un endroit particulier. Quelques erreurs isolées n'affecteront pas les propriétés diffractives de l'échantillon, mais si des erreurs de cette sorte se multiplient, elles perturberont les figures de diffraction. 1, record 1, French, - d%C3%A9sordre%20de%20phase
Record 1, Spanish
Record 1, Textual support, Spanish
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