Figure 3.3.10.8

Hahn, Th.; Klapper, H.

doi:10.1107/97809553602060000644

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

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International Tables for Crystallography (2006). Vol. D. ch. 3.3, p. 436

Figure 3.3.10.8

Th. Hahn^a ^* and H. Klapper^b

^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 3.3.10.8

KLiSO₄: Bulk tetrahedral framework structures and models of (0001) twin boundary structures of phases III and IV. Small tetrahedra: SO₄; large tetrahedra: LiO₄; black spheres: K. All three figures play a double role, both as bulk structure and as (0001) twin-boundary structures. (a) and (b) Left- and right-handed bulk structures of phase III ( [P6_3] ), as well as possible structures of the (0001) twin boundary in phase IV. (c) Bulk structure of phase IV ( [P31c] ), as well as possible structure of the (0001) twin boundary in phase III. The SO₄ tetrahedra covered by the LiO₄ tetrahedra are shown by thin lines. Dotted line: $[\{10{\bar 1}0\}]$ c-glide plane. In all cases, the (0001) twin boundary is located between the two tetrahedral layers parallel to the plane of the figure.