Mechanical twinning
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.7.3,
p.
[ doi:10.1107/97809553602060000917 ]
supergroup . From a symmetry point of view, this means that the composite symmetry of the twin is noncrystallographic [ cf. Section 3.3.4.4 (ii) ]. This case is illustrated by the famous deformation twins of
calcite (Fig.
3.3.7.3 ...
Twinning by nucleation
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.7.1.1,
p.
[ doi:10.1107/97809553602060000917 ]
with three orientation states (Fig.
3.3.7.2) .
Figure
3.3.7.1
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Orthoclase (monoclinic K-feldspar). Two views, (a) and (b), of Carlsbad penetration twins (twofold twin axis [001 ...
Genetic classification of twins
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.7,
p.
[ doi:10.1107/97809553602060000917 ]
and complex [001] penetration twin of the monoclinic feldspar orthoclase (Fig.
3.3.7.1) and the sector twins of ammonium lithium sulfate with three orientation states (Fig.
3.3.7.2) .
Figure
3.3.7.1 ...
Growth twinning
Hahn, Th. and
Klapper, H.,
International Tables for Crystallography
(2013).
Vol. D,
Section 3.3.7.1,
p.
[ doi:10.1107/97809553602060000917 ]
and complex [001] penetration twin of the monoclinic feldspar orthoclase (Fig.
3.3.7.1) and the sector twins of ammonium lithium sulfate with three orientation states (Fig.
3.3.7.2) .
Figure
3.3.7.1 ...