Moderate

In the NaCl crystal, chloride ions present at the face center are distributed in:

Correct answer: D. 2 Unit Cells

  • A. One Unit Cell
  • B. 8 Unit Cells
  • C. 4 Unit Cells
  • D. 2 Unit Cells

Explanation

In the z=0 configuration below, the center chloride ion actually belongs to two unit cells in the overall crystal.

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