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

International Tables for Crystallography (2006). Vol. D. ch. 3.3, p. 407

Figure 3.3.6.5 

Th. Hahna* and H. Klapperb

a Institut für Kristallographie, Rheinisch–Westfälische Technische Hochschule, D-52056 Aachen, Germany, and bMineralogisch-Petrologisches Institut, Universität Bonn, D-53113 Bonn, Germany
Correspondence e-mail:  hahn@xtal.rwth-aachen.de

[Figure 3.3.6.5]
Figure 3.3.6.5

Contact growth twin of calcite with the same twin law as FeBO3 in Fig. 3.3.6.4[link]. Conspicuous twin element: twin reflection plane (0001), coinciding with the composition plane (0001).