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The radius of a calcium ion is 94 pm and of the oxide ion is 146 pm . The possible crystal structure of calcium oxide will be

Options

  1. Atetrahedral
  2. Btrigonal
  3. Coctahedral
  4. Dpyramidal

Correct answer

C. octahedral

Step-by-step solution

As per formula, aligned radius ratio & = radius of cation radius of anion & = 94 146 =0.643 aligned Since the value is between 0.414-0.732 hence the coordination no. will be 6 and geometry will be octahedral.

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