International
Tables for
Crystallography
Volume B
Reciprocal space
Edited by U. Shmueli

International Tables for Crystallography (2010). Vol. B, ch. 1.5, p. 185   | 1 | 2 |

Figure 1.5.5.3 

M. I. Aroyoa* and H. Wondratschekb

aDepartamento de Fisíca de la Materia Condensada, Facultad de Cienca y Technología, Universidad del País Vasco, Apartado 644, 48080 Bilbao, Spain , and bInstitut für Kristallographie, Universität, D-76128 Karlsruhe, Germany
Correspondence e-mail:  wmpararm@lg.ehu.es

[Figure 1.5.5.3]
Figure 1.5.5.3

Brillouin zone with asymmetric unit and representation domain of CDML for arithmetic crystal class [4/mmmI]: [c/a \,\lt \, 1]. Space groups [I4/mmm-D_{4h}^{17}] (139) to [I4_1/acd-D_{4h}^{20}] (142). Reciprocal-space group ([I4/mmm])*, No. 139: [c^{*}/a^{*}\,\gt \, 1] (see Table 1.5.5.3[link]). The representation domain of CDML is different from the asymmetric unit. Auxiliary points: T: [0,0,\textstyle{1 \over 4}]; T2: [\textstyle{1 \over 2},\textstyle{1 \over 2},\textstyle{1 \over 4}]; X2: [0,\textstyle{1 \over 2},\textstyle{1 \over 2}]. Flagpole: [[T\,M_2]\quad 0,0,z]: [\textstyle{1 \over 4} \,\lt \, z \,\lt \, \textstyle{1 \over 2}]. Wing: [[T\,P\,X_2\,M_2]\quad 0,y,z]: [0 \,\lt \, y \,\lt \, \textstyle{1 \over 2}], [\textstyle{1 \over 4} \,\lt \, z \,\lt \, \textstyle{1 \over 2}].