Entropy and Susceptibility of a Pure Dipole‐Dipole Substance

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Abstract
Recalculation of the lattice sums for a pure dipole‐dipole interaction show that the Curie‐Weiss constant, for fields perpendicular to the c‐axis is equal to 0.273 mdeg for cerous magnesium nitrate. A g‐value of 1.82 was used. The temperature dependence of the entropy was determined and is compared with the experimental values of Hudson and Kaeser. All lattice sums have been determined as a function of slight changes in the lattice constants. The z‐component of the dipolar lattice sum is determined by means of a new procedure to improve the slow convergence of this series.

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