a- Consider the CaO material and answer the questions

1- Based on the ionic rays, estimate in which sites the cations will be located.

2- Estimate what configuration the anions will then be organized to have such sites present in the structures.

3- Then calculate the number of anions and the number of interstitial sites available per unit cell.

4- Based on the ionic charges and the number of interstitial sites available in the configurations, estimate the fraction of the sites occupied by the cations.

5- Then identify the type of crystal structure of this material.

b- Give the formula for the density of a ZnS-type structure containing covalent bonds as a function of bond length and atomic weights.

c- Which mechanical test is the most suitable to measure the mechanical properties of a ceramic? Cite two reasons.