Pseudo-merohedry and ferroelasticity
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.9.3,
p.
[ doi:10.1107/97809553602060000917 ]
transformation twin, discussed in Section
3.3.9.2.2, Example (1) . This topic is extensively treated in Chapter 3.4
on domain structures.
References
International Tables for Crystallography (2013). Vol. D. ch ...
Merohedral twins of lattice index
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.9.2.1,
p.
[ doi:10.1107/97809553602060000917 ]
phosphate, KTiOPO 4 : polar point group, forms inversion twins (ferroelectric domains) below its Curie temperature of 1209 K.
References
Klapper,
H., Hahn, Th. & Chung, S. J. (1987). Optical ...
Definitions of merohedry
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.9.1,
p.
[ doi:10.1107/97809553602060000917 ]
[Reprinted (1964). Paris: Blanchard]. Google Scholar
Hahn, Th. &
Klapper,
H. (2005). Point groups and crystal classes. Part 10 in International Tables for Crystallography, Vol. A, Space-Group Symmetry, edited by Th. Hahn, 5th ed ...
Twinning with partial lattice pseudo-coincidence (lattice index )
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.9.2.4,
p.
[ doi:10.1107/97809553602060000917 ]
Section 3.3.8.4). In this sense, the two Sections
3.3.9.2.3 and
3.3.9.2.4 are analogous to the two Sections
3.3.9.2.1 and
3.3.9.2.2 .
The following four examples are characteristic of this group:
(1) (110) reflection ...
Twinning by merohedry and pseudo-merohedry
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.9,
p.
[ doi:10.1107/97809553602060000917 ]
lattices (pseudo-coincidence, cf. Section 3.3.8.4). In this sense, the two Sections
3.3.9.2.3 and
3.3.9.2.4 are analogous to the two Sections
3.3.9.2.1 and
3.3.9.2.2 .
The following four examples are characteristic of this group ...
Twinning with partial lattice coincidence (lattice index )
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.9.2.3,
p.
[ doi:10.1107/97809553602060000917 ]
with (twins) in SmS 1.9 (Tamazyan et al., 2000 b). This rare twin is illustrated in Fig. 3.3.8.1 and is described, together with the twins of the related phase PrS 2, in Example (3) of Section
3.3.9.2.4 below.
(4 ...
Types of twins by merohedry and pseudo-merohedry
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.9.2,
p.
[ doi:10.1107/97809553602060000917 ]
Section 3.3.8.4). In this sense, the two Sections
3.3.9.2.3 and
3.3.9.2.4 are analogous to the two Sections
3.3.9.2.1 and
3.3.9.2.2 .
The following four examples are characteristic of this group:
(1) (110) reflection ...
Pseudo-merohedral twins of lattice index
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.9.2.2,
p.
[ doi:10.1107/97809553602060000917 ]
of crystals
These twins are characterized by pseudo-merohedry of point groups, Case (1) in Section
3.3.9.1 . The following examples are based on structural pseudosymmetry and consequently also on lattice pseudosymmetry, either ...
