Extension to non-merohedral growth and mechanical twins
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.10.2.2,
p.
[ doi:10.1107/97809553602060000917 ]
of the W boundary as given above in Section
3.3.10.2.1 : The (rational) symmetry operations of the parent phase, becoming F operations in the phase transformation, have to be replaced by the (growth) twin operations contained in the coset ...
Twinning dislocations
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.10.8,
p.
[ doi:10.1107/97809553602060000917 ]
(Read, 1953, p. 109; J. Friedel, 1964, p. 173). Geometrically, a twinning dislocation is a step in the twin boundary (Fig.
3.3.10.15), i.e. a line along which the twin interface `jumps' from one lattice plane to the next. As shown in Fig ...
Strain compatibility of interfaces
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.10.2,
p.
[ doi:10.1107/97809553602060000917 ]
of crystals
For a simple derivation of stress-free contact planes, we go back to the classical description of mechanical twinning by a homogeneous shear, which is illustrated by a deformation ellipsoid as shown in Fig.
3.3.10.1 ...
Twin boundaries
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.10,
p.
[ doi:10.1107/97809553602060000917 ]
in Sections
3.3.10.7.1 and
3.3.10.7.2 below, have to be distinguished. Discussions of the most important twin cases follow in Sections
3.3.10.7.3 to
3.3.10.7.5 .
3.3.10.7.1. Merohedral (non-ferroelastic) twins (see Sections 3.3.9 ...
Fitting problems of ferroelastic twins
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.10.7.3,
p.
[ doi:10.1107/97809553602060000917 ]
to the parent symmetry . It can be large, however, for deformation twins, e.g.
calcite . The resulting fitting problems in ferroelastic textures are illustrated in Fig.
3.3.10.12 (c) . Owing to the splitting angle, twin domains would ...
Twin textures
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.10.7,
p.
[ doi:10.1107/97809553602060000917 ]
the point of view of form changes, two categories of twins, described in Sections
3.3.10.7.1 and
3.3.10.7.2 below, have to be distinguished. Discussions of the most important twin cases follow in Sections
3.3.10.7.3 to
3.3.10.7.5 ...
