Diffraction patterns data collection from

Table 4.8. Digitized x-ray diffraction pattern representing data collected from a two-phase...

Raw X-ray diffraction data, either digital or acquired on a strip recorder, are used make mineral identifications as summarized above. Whole sample data collected from random powder mounts are compared to patterns of known minerals either manually or using a computer search-match program such as /zPDSM (Marquart, 1986). Because each component in a mixture of crystalline materials produces its own characteristic pattern that is independent of others, the identification process becomes one of simply unscrambling the superposed patterns. 

Princeton Instruments (now Roper Scientific), and was used to store and display the x-ray diffraction data in real time. By incrementally jogging the weld to new locations in 200 pm intervals, a series of space-resolved x-ray diffraction patterns was collected along a lineal scan direction perpendicular to and away from the centerline of the weld. A schematic of the SRXRD setup is shown in Figure 2. Details of the apparatus has been described in detail elsewhere. ... 

Multiple isomorphous replacement allows the ab initio determination of the phases for a new protein structure. Diffraction data are collected for crystals soaked with different heavy atoms. The scattering from these atoms dominates the diffraction pattern, and a direct calculation of the relative position of the heavy atoms is possible by a direct method known as the Patterson synthesis. If a number of heavy atom derivatives are available, and... 

Fig. 7. The instrumental set up at XI1 /DORIS for time resolved data collection with a linear detector for CO myoglobin following laser photolysis of the ligand. A section of the diffraction pattern with stationary crystal, stationary detector is recorded with a linear detector and (b) shows the time course of three reflections before and after the laser flash (from Bartunik et al. 1982)...

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