Radiation chemistry diffraction

X-ray diffraction, 39 160-161, 164-165 Radial factor, 22 214-218 Radiation, see also Irradiation cosmic, see Cosmic radiation terrestial origin, 3 288-293 Radiation chemistry, heterogeneous kinetics of, 3 198-203... 

Neutron diffraction is complementary to X-ray diffraction and is used widely as a tool for structure refinement in oxide chemistry. For example, the expressions for the structure factor Fhki are compared for both radiation types below ... 

In coordination chemistry, the most likely reason to be concerned with the growth of crystals is in order to obtain a crystal structure by either X-ray or neutron diffraction from a single crystal. Major points of interest are the quality and size of crystals for this purpose. The size requirements have become less severe in recent years, because of the development of new diffraction techniques, particularly the widespread introduction of area detectors and the use of more powerful sources of X rays (including synchrotron radiation) and neutrons, and it is also possible to obtain structural results from poorer quality crystals than was formerly the case. However, the main factor influencing the quality and precision of a crystal structure is usually the quality of the crystal from which the data are obtained, and a low-precision structure, although of some use, is restricted in value, may not provide the desired information, and is likely to be unpublishable. 

Figure 3.2 The timescale of various biological processes and approximate time resolutions of diffraction data recording, afforded with different synchrotron radiation sources. From Moffat (1989a) reproduced with permission of the author and from the Annual Review of Biophysics and Biophysical Chemistry 18, 1989 Annual Reviews Inc.

---