Figure 3.4.3.5

Janovec, V.; Přívratská

doi:10.1107/97809553602060000645

International
Tables for
Crystallography
Volume D
Physical properties of crystals
Edited by A. Authier

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International Tables for Crystallography (2006). Vol. D. ch. 3.4, p. 482

Figure 3.4.3.5

V. Janovec^a ^* and J. Přívratská^b

^a Department of Physics, Technical University of Liberec, Hálkova 6, 461 17 Liberec 1, Czech Republic, and ^bDepartment of Mathematics and Didactics of Mathematics, Technical University of Liberec, Hálkova 6, 461 17 Liberec 1, Czech Republic
Correspondence e-mail: janovec@fzu.cz

Figure 3.4.3.5

Formation of a ferroelastic domain twin. (a) Formation of ferroelastic single-domain states $[{\bf R}_1, {\bf R}_2]$ from the parent phase $[{\bf R}_0]$ ; p and $[p^\prime]$ are two perpendicular planes of equal deformation. (b) Formation of a ferroelastic twin: (i) by rotating the single-domain states $[{\bf S}_1, {\bf S}_2]$ in (a) through an angle $[\pm{{1}\over{2}}\varphi]$ about the domain-pair axis A ( $[{\bf R}_1^+]$ and $[{\bf R}_2^-]$ are the resulting disoriented ferroelastic domain states); (ii) by a simple shear deformation with a shear angle (obliquity) $[\varphi]$ .