CHM101H1 Lecture Notes - Atomic Packing Factor, Ionic Radius, Zinc Sulfide
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Name student number tutorial number : compute the atomic packing factor for cesium chloride cscl using the ionic radii in table. 3. 4 and assuming that the ions touch along the cube diagonals. (0. 4 mark) For cscl the unit cell edge length, a, in terms of the atomic radii is just. Since vc = a3 , vc = (0. 405 nm)3 = 0. 0664 nm3. And, finally the atomic packing factor is just: calculate the density of sodium (na) metal. Radius of na atom is 0. 186 nm. (0. 3 mark) Vs = 43 rcs 3+ 43 rcl 3 43( )(0. 170 nm)3 + (0. 181 nm)3 0. 0454 nm3 a 2rcs+ + 2rcl-3 2(0. 170 nm) + 2(0. 181 nm)3 apf vsvc 0. 0454 nm30. 0664 nm3 0. 684aps 104 tutorial 2. Name student number tutorial number : compute the theoretical density of zns given that the zn s distance and bond angle are. Hint: zns is ceramic materials with zinc blende crystal structure; h= a/4.
