InterviewSolution
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InterviewSolution
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For crystal sodium chloride, state (i) the type of lattice in which it crystallises. (ii) co-ordination number of each sodium ion and chloride ion in the crystal lattice. (iii) number of sodium and chloride ions present in a unit cell of sodium chloride. (iv) the structural arrangement of sodium chloride crystals. |
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Answer» (i) Sodium chloride crystallises in expanded face centred cubic arrangement also known as cubic close packed arrangement. (ii) Co-ordination number of `Na^(+)` and `Cl^(-)` ions are in the ratio `6:6`. (iii) Unit cell of NaCl has four `Na^(+)` and four `Cl^(-)` ions. (iv) The structural arrangement of sodium chloride crystals is octahedral. |
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