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Why NaCl show octahedral geometry?...

Why NaCl show octahedral geometry?

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(i) An atom at the corner is shared by eight adjacent unit cells. Hence, portion of the atom at the corner that belongs to one unit cell = 1/8.
(ii) The atom at the body-centre of a cubic unit cell is not shared by any other unit cell. Hence, it belongs fully to the unit cell.
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BETTER CHOICE PUBLICATION-THE SOLID STATE-Numerical Problems
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  4. In a face centered cubic arrangement of A and B atoms whose A atoms ar...

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  5. A unit cell consists of a cube in which there are anions Y at each cor...

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  6. If three elements P, Q and R crystalline in a cubic solid lattice with...

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  7. A cube solid is made up of two elements P and Q. Atoms Q are present a...

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  8. Gold (atomic radius=0.144nm) crystallises in a face-centred unit cell ...

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  9. Aluminium crystallises in a cubic close packed structure. Its metallic...

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  10. Aluminium crystallises in a cubic close packed structure. Its metallic...

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  11. Silver crystallisaes in fcc lattice. If the edge length of th cell is ...

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  12. Copper crystallizes into a fcc lattice with edge length 3.61xx10^(-8) ...

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  13. An element with molar mass 2.7xx10^(-2) kg "mol"^(-1) forms a cubic un...

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  14. Silver crystallisaes in fcc lattice. If the edge length of th cell is ...

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  15. Silver forms cpp lattice and X-ray studies of its crystals show that t...

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