期刊
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES
卷 72, 期 -, 页码 55-61出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S2053273315018197
关键词
merohedral twins; quinary twins; Durer structure; polygonal tilings
资金
- French ANR [13-BS04-0005]
A twin is defined as being an external operation between two identical crystals that share a fraction of the atomic structure with no discontinuity from one crystal to the other. This includes merohedral twins, twins by reticular merohedry as well as coherent twins by contact where only the habit plane is shared by the two adjacent crystals (epitaxy). Interesting and original cases appear when the invariant substructure is built with positions belonging to the same Z-module as, for example, the quinary twin structure first drawn by Albrecht Durer [(1525). The Painter's Manual: a Manual of Measurement of Lines, Areas and Solids by Means of Compass and Ruler. Facsimile Edition (1977), translated with commentary by W.L. Strauss. New York: Abaris Books]. This paper will show that the Durer twins, once defined in five-dimensional space, are simple merohedral twins, in the sense of Georges Friedel, leaving the five-dimensional lattice invariant. This analysis will be generalized to some other higher-order Z-modules.
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