International
Tables for
Crystallography
Volume H
Powder diffraction
Edited by C. J. Gilmore, J. A. Kaduk and H. Schenk

International Tables for Crystallography (2018). Vol. H, ch. 2.2, p. 58

Figure 2.2.12 

A. Fitcha*

aESRF, 71 Avenue des Martyrs, CS40220, 38043 Grenoble Cedex 9, France
Correspondence e-mail: fitch@esrf.fr

[Figure 2.2.12]
Figure 2.2.12

Schematic representation of a parallel-beam diffractometer of the Hart–Parrish design. The collimators installed on Stations 8.3 and 2.3 at the SRS Daresbury (Cernik et al., 1990[link]; Collins et al., 1992[link]) had steel blades 50 µm thick, 355 mm long, separated by 0.2 mm spacers, defining a theoretical opening angle (FWHM Δc) of 0.032° and a transmission of 80%.