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Unformatted text preview: 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). Study questions: Note: These are additional questions to help guide you as you read and study. They will not be collected or graded. Callister 3.15 Iron oxide (FeO) has the rock salt crystal structure and a density of 5.70 g/cm 3 . (a) Determine the unit cell edge length. (b) How does this result compare with the edge length as determined from the radii in Table 3.4, assuming that the Fe 2+ and O 2– ions just touch each other along the edges? Callister 3.14 Compute the atomic packing factor for cesium chloride using the ionic radii in Table 3.4 and assuming that the ions touch along the cube diagonals...
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This note was uploaded on 11/28/2010 for the course ENME 250 taught by Professor Shang during the Spring '10 term at Maryland.
- Spring '10