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 Results for DC.creator="H." AND DC.creator="Klapper" in section 3.3.9 of volume D
Twinning by merohedry and pseudo-merohedry
Hahn, Th. and Klapper, H.  International Tables for Crystallography (2013). Vol. D, Section 3.3.9, pp. 446-450 [ doi:10.1107/97809553602060000917 ]
... and Fig. 10.1.3.2 of Volume A of this series (Hahn & Klapper, 2005); cf. also Koch (2004), Table 1.3.4.1. Case (2): `Merohedry ... in detail by optical activity, pyroelectricity and X-ray topography (Klapper et al., 1987). (4) Potassium titanyl phosphate, KTiOPO4: polar ... on domain structures. References B÷ttcher, P., Doert, Th., Arnold, H. & Tamazyan, R. (2000). Contributions to the crystal chemistry ...

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, pp. 448-450 [ doi:10.1107/97809553602060000917 ]
... above in detail. References B÷ttcher, P., Doert, Th., Arnold, H. & Tamazyan, R. (2000). Contributions to the crystal chemistry of ... Kristallogr. 215, 246-253. Docherty, R., El-Korashy, A., Jennissen, H.-D., Klapper, H., Roberts, K. J. & Scheffen-Lauenroth, T. (1988). ...

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. 448 [ doi:10.1107/97809553602060000917 ]
... in Section 3.3.9.1, Case (2). References Tamazyan, R., Arnold, H., Molchanov, V. N., Kuzmicheva, G. M. & Vasileva, I. G. (2000b ...

Pseudo-merohedral twins of lattice index
Hahn, Th. and Klapper, H.  International Tables for Crystallography (2013). Vol. D, Section 3.3.9.2.2, pp. 447-448 [ doi:10.1107/97809553602060000917 ]
Pseudo-merohedral twins of lattice index 3.3.9.2.2. Pseudo-merohedral twins of lattice index 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 as the result of phase transformations or of ...

Merohedral twins of lattice index
Hahn, Th. and Klapper, H.  International Tables for Crystallography (2013). Vol. D, Section 3.3.9.2.1, p. 447 [ doi:10.1107/97809553602060000917 ]
... in detail by optical activity, pyroelectricity and X-ray topography (Klapper et al., 1987). (4) Potassium titanyl phosphate, KTiOPO4: polar ... twins (ferroelectric domains) below its Curie temperature of 1209K. References Klapper, H., Hahn, Th. & Chung, S. J. (1987). Optical, pyroelectric ...

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, pp. 447-450 [ doi:10.1107/97809553602060000917 ]
... in detail by optical activity, pyroelectricity and X-ray topography (Klapper et al., 1987). (4) Potassium titanyl phosphate, KTiOPO4: polar ... above in detail. References B÷ttcher, P., Doert, Th., Arnold, H. & Tamazyan, R. (2000). Contributions to the crystal chemistry of ... Kristallogr. 215, 246-253. Docherty, R., El-Korashy, A., Jennissen, H.-D., Klapper, H., Roberts, K. J. & Scheffen-Lauenroth, T. ( ...

Definitions of merohedry
Hahn, Th. and Klapper, H.  International Tables for Crystallography (2013). Vol. D, Section 3.3.9.1, p. 447 [ doi:10.1107/97809553602060000917 ]
... and Fig. 10.1.3.2 of Volume A of this series (Hahn & Klapper, 2005); cf. also Koch (2004), Table 1.3.4.1. Case (2): `Merohedry ... Berger-Levrault. [Reprinted (1964). Paris: Blanchard]. Hahn, Th. & Klapper, H. (2005). Point groups and crystal classes. Part 10 ...

Pseudo-merohedry and ferroelasticity
Hahn, Th. and Klapper, H.  International Tables for Crystallography (2013). Vol. D, Section 3.3.9.3, p. 450 [ doi:10.1107/97809553602060000917 ]
Pseudo-merohedry and ferroelasticity 3.3.9.3. Pseudo-merohedry and ferroelasticity The large group of pseudo-merohedral twins (irrespective of their lattice index) contains a very important subset which is characterized by the physical property ferroelasticity. Ferroelastic twins result from a real or virtual phase transition involving a change of the crystal family ...

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