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Textbook Expert
Textbook ExpertVerified Tutor
28 Nov 2021

Given information

The unit cells for lithium oxide and silver iodide are pictured.

Step-by-step explanation

Step 1.

Lithium oxide unit cell:

Oxygen forms a face-centered cubic unit cell.

Hence number of effective oxygen ions per unit cell:

 

The number of effective oxygen ions per unit cell in Lithium oxide is    

The number of effective lithium ions per unit cell in Lithium oxide is    

Thus the ratio of cation to anion in this unit cell

   

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