The Madelung constants for the calcium carbide and pyrite crystal structures have been calculated assuming that the anion can be represented by two spherically symmetric charge distributions. The results indicate that the assumption that the anion is spherically symmetric can lead to small errors in the case of the pyrite structure and large errors in the case of the calcium carbide structure.
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The author would be glad to share the Bendix G‐15D program for calculating lattice energies with anyone who is interested.
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© 1962 American Institute of Physics.
1962
American Institute of Physics
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