By J.P. Suchet
Crystal Chemistry and Semiconduction in Transition steel Binary Compounds.
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Extra info for Crystal Chemistry and Semiconduction in Transition Metal Binary Compounds
1. Spatial distribution of the dx2_y2 and d^y orbitals and forces of repulsion exerted by the anions: (a) in a tetrahedral arrangement and (b) in an octahedral arrangement. In this way one can classify the relative energies of these orbitals. 2-3,2 and d z 2, on the other, are shown artificially separated in Fig. 2, but what is in fact involved is triple and double orbitals, which are referred to either as de and dy, or, using a notation borrowed from the group theory, t2 and e (according to this notation, the s orbitals are called al and the p orbitals ^ ) .
Cornell Univ. Press, Ithaca, New York, 1950. 7] A. Neuhaus, Fortschr. Mineral 32, 37 (1954). 8] J. P. Suchet, / . Phys. Chem. Solids 12, 74 (1959). 9] H. Krebs and W. Schottky, Halbleiterprobleme 1, 25 (1954). 10] H. " Springer, Berlin, 1954. 11] J. P. Suchet and F. Bailly, Ann. Chim. (Paris) 10, 517 (1965). 12] J. P. Suchet, / . Phys. Chem. Solids 21, 156 (1961). 13] F. Hund, Z. Phys. 51, 759 (1928); 63, 719 (1930). 14] R. A. " Cambridge Univ. Press, London and New York, 1959. 15] P. Aigrain and F.
Electron individually, applies to transfers. But since a charge can be carried only in an energy band, one is forced to speak of a partly filled d band, and consequently of metallic conductibility. In the particular case of insulating materials such as very pure MnO and NiO, this is a difficulty that was evaded by the concept of "narrow" band. In addition, as for any MO, one has to define bonding and antibonding states, involving an unfortunate confusion with the (B) and (AB) bands of metal-metalloid pairs in the VB method.
Crystal Chemistry and Semiconduction in Transition Metal Binary Compounds by J.P. Suchet