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

International Tables for Crystallography (2006). Vol. B. ch. 2.1, p. 191

Table 2.1.3.1 

U. Shmuelia* and A. J. C. Wilsonb

aSchool of Chemistry, Tel Aviv University, Tel Aviv 69 978, Israel, and bSt John's College, Cambridge, England
Correspondence e-mail:  ushmueli@post.tau.ac.il

Table 2.1.3.1| top | pdf |
Intensity-distribution effects of symmetry elements causing systematic absences

Abbreviations and orientation of axes: A = acentric distribution, C = centric distribution, Z = systematically zero, S = distribution parameter, <I> = average intensity. Axes are parallel to c, planes are perpendicular to c.

ElementReflectionsDistribution[S/\Sigma][\langle I\rangle/\Sigma]
[2_{1}] hkl A 1 1
hk0 C 1 1
00l [(Z + A)/2] 1 2
[3_{1}, 3_{2}] hkl A 1 1
hk0 A 1 1
00l [(2Z + A)/3] 1 3
[4_{1}, 4_{3}] hkl A 1 1
hk0 C 1 1
00l [(3Z + A)/4] 1 4
[4_{2}] hkl A 1 1
hk0 C 1 1
00l [(Z + A)/2] 2 4
[6_{1}, 6_{5}] hkl A 1 1
hk0 C 1 1
00l [(5Z + A)/6] 1 6
[6_{2}, 6_{4}] hkl A 1 1
hk0 C 1 1
00l [(2Z + A)/3] 2 6
[6_{3}] hkl A 1 1
hk0 C 1 1
00l [(Z + A)/2] 3 6
a hkl A 1 1
hk0 [(Z + A)/2] 1 2
00l C 1 1
0k0 A 2 2
C, I All [(Z + A)/2] 1 2
F All [(3Z + A)/2] 1 4