Unformatted text preview: 4. Callister 3.12 On the basis of ionic charge and ionic radii, predict crystal structures for the following materials: (a) CaO (b) KBr. Justify your selections. Include why it is appropriate to use ionic charge and ionic radii in your justification. 5. Callister 3.17 A hypothetical AX type of ceramic material is known to have a density of 2.10 g/cm 3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. The atomic weights of the A and X elements are 28.5 and 30.0 g/mol, respectively. On the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende? Justify your choice(s)....
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- Spring '12
- Materials Science, Sodium chloride, Crystal, Chemical Properties