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

International Tables for Crystallography (2013). Vol. D, ch. 3.4, p. 517

Figure 3.4.3.5 

V. Janoveca* and J. Přívratskáb

aInstitute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, CZ-18221 Prague 8, 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]
Figure 3.4.3.5

Two ways of constructing a ferroelastic domain twin. (a) Formation of ferroelastic single-domain states [{\bf R}_1, {\bf R}_2] from the parent phase state [{\bf R}_0] and then rotating away these single-domain states through an angle [\pm\textstyle{1\over 2}\omega] about the domain-pair axis H so that disoriented ferroelastic domain states [{\bf R}_1^+] and [{\bf R}_2^-] meet along one of two perpendicular planes of equal deformation p or [p^\prime]. (b) Formation of a ferroelastic twin from one ferroelastic domain state [{\bf R}_1^+] by a simple shear deformation with a shear angle (obliquity) [\omega]. For more details see the text.