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प्रश्न
What type of close-packing is possessed by a crystal of NaCl?
लघु उत्तर
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उत्तर
In the crystal structure of sodium chloride (NaCl), the chloride ions (Cl−) form a cubic close-packed (ccp) or face-centred cubic (fcc) arrangement. The sodium ions (Na+) occupy the octahedral voids created by the close-packed Cl− ions. Both Na+ and Cl− ions have a coordination number of 6, meaning each ion is surrounded by six oppositely charged ions.
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