Eighteenth-century forms of quasicrystals



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Pina Martínez, Carlos Manuel and López-Acevedo, María Victoria (2016) Eighteenth-century forms of quasicrystals. Acta crystallographica. Section A, Foundations and advances (Online), A72 . pp. 82-84. ISSN 2053-2733

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Official URL: http://dx.doi.org/10.1107/S2053273315021865


A careful inspection of the drawings and baked clay models created by the mineralogist Romé de L’Isle in the 18th century has revealed the existence of a number of intriguing forms with pentagonal symmetries. These forms cannot be classified in any of the 32 crystal classes. They can thus be considered the first crystallographic descriptions of polyhedral forms found in quasicrystals two centuries later. This paper presents a symmetry analysis of the fascinating drawings and clay models with pentagonal symmetries described in the book Cristallographie published in 1783 by Romé de L’Isle, as well as a comparison with quasicrystals recently synthesized. The paper also briefly discusses what could induce Rome´ de L’Isle to consider forms with pentagonal symmetries as plausible crystal forms.

Item Type:Article
Uncontrolled Keywords:Quasicrystals; Crystallographic models; Romé de L’Isle; Symmetry analysis
Subjects:Sciences > Geology > Crystallography
ID Code:50881
Deposited On:24 Jan 2019 12:36
Last Modified:09 Jun 2020 11:11

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