International Tables of X-Ray Crystallography

International Tables of X-Ray Crystallography, Kynoch Press, Birmingham, 1974. 

N. F. M. Henry and K. Lonsdale, eds., International Union of Crystallization, "International Tables of X-ray Crystallography." Vol. 1, "Symmetry Groups." Kynoch Press, Birmingham, UK, 1952. 

The International Union of Crystallography. International Tables for X-ray Crystallography. Kynoch Press, Birmingham, UK (1969), Vol. I. 

As is evident from Eqs. (1.36) and (1.37), and from the classical treatment as well, the effect of resonance on the intensity of X-ray scattering is pronounced when E E0, that is, in the vicinity of the absorption edges. Even for data collected at other wavelengths, it is necessary to correct the structure factors for anomalous scattering before the electron density can be calculated by the Fourier inversions of Eqs. (1.22) and (1.26), as further discussed in chapter 5. The anomalous scattering factors needed for this purpose are available in the literature (International Tables for X-ray Crystallography 1974, Kissel and Pratt 1990). 

The functions Hartree-Fock valence shells of the atoms are tabulated in scattering factor tables (International Tables for X-ray Crystallography 1974,... 

The data, obtained through use of the equipment mentioned above, is tabulated in the format used in the ASTM Powder Diffraction File (Refs 4,6,10,21 22). likewise, the format and conventions of the International Tables for X-Ray Crystallography (Ref 5) are usually also adhered to closely... 

Figure 11.21. The diagrams and list of positions for space group P2,/c, as given in the International Tables for X-ray Crystallography (1965). The diagrams are projections on the ab plane.

Lists of equivalent positions for the 230 space groups can be found in International Tables for X-ray Crystallography, a reference series that contains an... 

Joyce-Loebel MK III C flat-bed microdensitometer. The structure factor magnitudes were derived from the integrated intensities according to F(hk ) 2 = I(hk ). The largest errors in the intensity measurements were for the darkest spots. The scattering factors of C, 0 H for the diffraction of electrons were taken from the International Tables for X-Ray Crystallography, vol. IV (7). No correction for multiple scattering and n-beam dynamical interactions were applied because the thickness of the crystals was of the order of 100 X (6). 

In the following discussion, for simplicity we make use of the pair of symmetry diagrams that constitute a representation of space group P2 jc (No. 14) in International Tables for X-Ray Crystallography Volume /, as displayed in Fig. 9.3.4. 

Diagrams showing (a) the general equivalent positions and (b) die symmetry elements in space group P2 /c as presented in International Tables for X-Ray Crystallography Volume I. The bold numerals in the left figure are added for die purpose of discussion. 

International Tables for X-Ray Crystallography, Vol. Ill" published for the International Union of Crystallography by Kynoch Press, Birmingham, England, 1962 p. 162. 

Figure 7.18 shows the information provided by the International Tables for X-Ray Crystallography, Volume I (and also the newer Volume A) for that most frequent and popular of space groups for organic crystals, P2i /c. The top line in Fig. 7.18 identifies the crystal system (monoclinic), the full international symbol (P 1 2 /c 1), which says that the lattice is primitive (P), that along the... 

There is an inherent deficiency in crystal symmetry in that crystals are not really infinite. Alan Mackay argued that the crystal formation is not the insertion of components into a three-dimensional framework of symmetry elements on the contrary, the symmetry elements are the consequence [121], The crystal arises from the local interactions between individual atoms. He furthermore said that a regular structure should mean a structure generated by simple rules, but the list of rules considered to be simple and permissible should be extended. These rules would not necessarily form groups. Furthermore, Mackay found the formalism of the International Tables for X-Ray Crystallography... 

Both general and special positions are also called Wyckoff positions, in honor of the American crystallographer Ralph Walter Graystone Wyckoff (1897-1994). Wyckoff s 1922 book. The Analytical Expression of the Results of the Theory of Space Groups, contained tables with the general and special positional coordinates permitted by the symmetry elements. This book was the foremnner of International Tables for X-ray Crystallography, which first appeared in 1935. 

Unil cell parameters and their esd s were derived by a leasi-squares Ht to the setting angles of the unresolved Mo Ka components of 25 reflections with 26 between 30,3 and 37.2. International Tables for X>ray Crystallography Kynoch Birmingham, England, 1965 Vol. 1. The quantity minimized in the least-squares procedures is h ( / o -... 

H. Lipson. Absorption corrections. In International Tables for X-ray Crystallography. Volume II. Mathematical Tables. Section 5. Physics of Diffraction Methods. (Eds., Kasper, J. S., and Lonsdale, K.) pp. 291-312. Kynoch Press Birmingham (1959). 

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