Factors determining the average atomic volumes in intermetallic compounds.
In formation of an intermetallic compound from the elementary metals there is usually a contraction in volume. Electron transfer leading to the charge states M(+) and M(-) with increase in valence and decrease in volume explains the more than 2-fold range in contraction for different compounds in the same binary system. In a more thorough analysis, the better packing of atoms of different sizes also needs to be considered.
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Linus Pauling Institute of Science and Medicine, 440 Page Mill Road, Palo Alto, CA 94306.