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22 May, 08:35

Define coordination number. How does this differ from atomic packing factor?

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  1. 22 May, 10:09
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    Coordination number:

    Coordination number can be defined as the number of nearest atoms which touch the central atom. In simple word the number of neighbours atoms which touches a an atoms.

    Atomic packing factor:

    It is also known as packing efficiency. It is the fraction of volume in a Crystal which is filled by constituent particles. It is always less than 1. Generally it is represented in the fraction.

    Ex:

    Lets take FCC cubic cell

    Coordination number = 12.

    Atomic packing factor = 74%
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