1. Questions and Calculations- Fluorite structure (a) In CaF2, which ions are lo

Question

1. Questions and Calculations- Fluorite structure (a) In CaF2, which ions are located at the lattice points of the ccp structure? Ca (b) Which type of interstitial sites are filled by Fions? (c) What is the CN of Ca2* ions in the lattice? 2+-- (d) What is the CN of F ions? 2. Questions Anti-fluorite structure (a) Which ions are located at the lattice points of ccp structure? (a) Na* (b) o2 (b) Which ions fill all the t-sites? (a) Na* (b) O2 (c) What is the CN of Na" ion in the lattice? (d) What is the CN of O2 ion in the lattice?

Explanation / Answer

1 a) Ca2+

b) Tetrahedral voids are occupied by F- ions.

c) 8

d) 4

2 a) O2-

b) Na+

c) 4

d) 8

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