the shape of nacl crystal is tetrahedral or octahedral or hexagona
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Explanation:
NaCl has fcc arrangement of Cl- ions. Hence, number of Cl- ions in packing per unit cell = 4. ... of tetrahdral voids is double the number of octahedral voids. Hence, tetrahedral voids = 4.
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Explanation:
The NaCl structure is a good example of the latter. One octahedral and one tetrahedral site in a face-centered cubic unit cell. Each cell contains four packing atoms (gray), four octahedral sites (pink), and eight tetrahedral sites (blue).
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