1307. ---------------. [HÄGG, G.] [Regularity in Crystal Structure in Hydrides, Borides, Carbides and Nitrides of Transition Elements.] Ztschr. physik. Chem., vol. 12, B, 1931, pp. 33-56; Chem. Abs., vol. 25, 1931, p. 2615.

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Literature Abstracts

1307. ---------------. [HÄGG, G.] [Regularity in Crystal Structure in Hydrides, Borides, Carbides and Nitrides of Transition Elements.] Ztschr. Physik. Chem., vol. 12, B, 1931, pp. 33-56; Chem. Abs., vol. 25, 1931, p. 2615.

Structure of crystals of binary compounds containing a so-called “transition element” and H, B, C, or N is critically examined with respect to the ratio of atomic radii. If this ratio r_m:r_x>1.7 the structure is simple, while if the ratio is smaller, the structure becomes more complex the smaller the radius of metal ion. Only these combinations show a typical metallic character in crystal structure, which is termed an infiltration structure. The latter shows a combination M₄X, M₂X, MX, and MN₂, each of which is described. The face-centered cubic or close-packing hexagonal lattice, both of coordination number 12 are most often observed. 1 case each of body-centered cubic and simple hexagonal, both of coordination number 8, was found. Careful discussion follows of the packing arrangement of atoms and the relation to coordination numbers.