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Additional recommended knowledge
1. A coordinated polyhedron of anions is formed about each cation, the cation-anion distance determined by the sum of ionic radii and the coordination number (C.N.) by the radius ratio.
This is expressed mathematically as:
Some examples are:
3. The sharing of edges and particularly faces by two anion polyhedra decreases the stability of an ionic structure.
5. The number of essentially different kinds of constituents in a crystal tends to be small.("The rule of parsimony".)
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Pauling's_rules". A list of authors is available in Wikipedia.|