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Unformatted text preview: 5. Titanium is an important component of materials used in aerospace applications. It has a BCC crystal structure at high temperatures, but transforms to the HCP structure during cooling. This HCP structure has a ratio of c/a=1.59. In addition, the atomic radius increases by 3% in transforming from BCC to HCP. Determine the percent volume change due to the transformation. 6. Cite the indices of the first four diffraction peaks for Cr. 7. Calculate the density of CaTiO 3 . 8. CsI is an ionic solid that can be regarded as Cs + and I-ions packed together in a three dimensional structure. The ionic radii are 1.69 Å for Cs + and 2.16 Å for I-. a) Provide the shorthand electron notation for the elements Cs and I and based on that justify the ionic bonding exhibited by these two elements; b) Determine the Bravais lattice; c) Calculate the lattice parameter a ; d) Calculate the theoretical density of this compound....
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- Fall '10
- Mechanical Engineering, Atomic Radius, Ion, Crystal, Crystal system, Professor Meletis