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· The total potential for the NaCl ion pair, with the zero
of potential based on the two neutral atoms at infinity, is shown in the diagram.
· For this case, n = 1 and m = 10, also A = 1.436
and B = 7.32 x 10- 6 when the energies are measured in eV and distances
in nm. DE = 1.4 eV.
· The
equilibrium separation of the ions 0.12 nm
·
A
feature of the ionic potential is the long range of the electrostatic term.
In a condensed phase an ion will interact with many other ions, not just its
nearest neighbors. |
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From:
Moffatt, Pearsall, and Wulff,
"The Structure and Properties of Materials,"
Wiley
(1967) |
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