Divergence slit variable

Fig. 3. X-ray diffractogram of Class-F bituminous coal fly ash. Analytical conditions diffraction data were collected using a Philips X-ray powder diffractometer (45 kV/30-40 mA CuKa theta-compensating variable divergence slit diffracted-beam graphite monochromator scintillation detector) automated with an MDI/Radix Databox. The scan parameters were typically 0.02° step size for 1 s count times over a range of 5-60° 2-theta. All data were analysed and displayed using a data reduction and display code (JADE) from Materials Data Inc., livermore, CA.

Figure 3.38. The set of x-ray powder diffraction patterns collected from the LaNi4 gsSno.ij powder (see the inset in Figure 3.32) on a Rigaku TTRAX powder diffractometer using Mo Ka radiation. Goniometer radius R = 285 mm Divergence slit DS = 0.5° flat specimen diameter d = 20 mm. Diffracted beam apertures were 0.01,0.02,0.03, 0.04,0.05, 0.06, 0.07, 0.08, 0.1, 0.12° and completely opened ( 1°), respectively. An automatic variable scatter slit was used to reduce the background. The data were collected with a fixed step A20 = 0.01°, and the sample was continuously spun during the data collection.

Figure 3.41. The schematic of goniometer optics during data collection employing variable divergence and scatter slits apertures, which enables one to maintain the irradiated area of the sample constant at any Bragg angle. DS - divergence slit, ScS - scatter slit, RS - receiving slit.

Figure 4.18 Powder pattern of Pb myristate, Pb(Ci4H2702)2, taken with CuKa radiation and variable divergence slit. The closing of the divergence slit produces a false peak at 29 0.5° (Schreiner, 1986. )...

Figure 3.13. The overall view of the goniostat of the Rigaku TTRAX rotating anode powder diffractometer with the horizontal goniometer axis, and synchronized rotations of both the x-ray source and detector arms. This goniometer is equipped with variable divergence, scatter and receiving slits, curved crystal monochromator, and scintillation detector. (Courtesy of Rigaku/MSC.)...

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