structure and properties of material Assignment 1 1- Derive a relationship for cell parameter (a) and atomic radius r for the following crystal structure. SC, BCC and FCC 2- In tabulated form –show and calculate the required for each unit cell related to atomic radius "r" 3-What is the difference between a crystal structure and a crystal system? 4-Show that the ideal h/a ratio for HCP is 1.633 Where: "a" is the unit cell edge length "h" is the height of CPH unit cell 5-Show that the atomic packing factor for HCP Is 0.74.
6- Proof that the APF for FCC is higher than the APF for BCC.
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Transcript
SC
S1 : Lf
BCC ("- ."f".<\{\-/
AEq.=
=4n4r q^lu
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A =2_r
APF =
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