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What are the coordination number (C.N.) of C a 2 + and F - ion in calcium fluoride C a F 2 crystal structure?

Options

  1. AC.N. of C a 2 + = 4 and F - = 8
  2. BC.N. of C a 2 + = 6 and F - = 6
  3. CC.N. of C a 2 + = 8 and F - = 8
  4. DC.N. of C a 2 + = 8 and F - = 4

Correct answer

D. C.N. of C a 2 + = 8 and F - = 4

Step-by-step solution

Each C a 2 + ion is surrounded by 8 F - ions and each F - ion by 4 C a 2 + ions. Thus, coordination number of C a 2 + is 8 and F - is 4.

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