J. Phys. Soc. Jpn. 10 (1955) pp. 93-102 |Next Article| |Table of Contents|
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Methods of Calculating the Crystalline Electric Field
Department of Physics, Osaka University
(Received August 30, 1954)
Two convenient methods are developed for calculating the coefficients of expansion of the crystalline potential in spherical harmonics. One consists in extending Evjen's elementary method of obtaining Madelung's constant, dividing the lattice into multipoles, and summing their contributions in an elementary way, and the other is an extension of Bertaut's Fourier method of obtaining the electrostatic lattice energy of a point-charge lattice and that of a point-dipole lattice. For the latter, two slightly different methods are proposed. Applications to NaCl-type and CsCl-type lattices and to FeF2 and CoF2 lattices are given, and the merits and dismerits of the methods are discussed.
©1955 The Physical Society of Japan
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