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Earth and Space Sciences · 术语表

什么是 Ionic potential？

Definition 19.8 University Earth and Space Sciences — Year 1 · 第 19 章 — Weathering and Clays

The ionic potential of an ion is the ratio $z/r$ of its charge number $z$ to its ionic radius $r$ , here in ångströms (for the same coordination for all ions, sixfold in what follows).

The ionic-potential diagram: each ion placed by its effective ionic radius in sixfold coordination (Shannon, 1976) and its charge. The lines z/r = 3 and z/r = 10 separate the ions that leave in solution as cations, those that stay as hydroxides or oxides, and those that leave as oxyanions. Silicon lies on the upper boundary. — The ionic-potential diagram: each ion placed by its effective ionic radius in sixfold coordination (Shannon, 1976) and its charge. The lines $z/r = 3$ and $z/r = 10$ separate the ions that leave in solution as cations, those that stay as hydroxides or oxides, and those that leave as oxyanions. Silicon lies on the upper boundary.

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