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(i) What is meant by the term 'coordinat...

(i) What is meant by the term 'coordination number'?
(ii) What is the coordination number of atom: (a) in a cubic close-packed structure (b) in a body-centred cubic structure?

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(ii) (a) Coordination number of an atom in a ccp structure is 12, (b) in a bcc structure, coordination number is 8.
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