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Unformatted text preview: edges are 3.91Å, 3.165Å and 5.3Å, respectively. Helpful structural hints: Solid Ar adopts the FCC structure; Pt is very malleable and ductile; W is brittle. 5. Describe the unit cell for cesium chloride, cubic zinc sulfide and antifluorite (Na 2 O). How many atoms of each type are in each unit cell? 6. a. Describe the packing arrangement of silicon in the unit cell pictured above. b. How many atoms are in the unit cell of Si? c. Given that the density of Si is 2.3 g/cm 3 , calculate the length of the unit cell edge. d. Calculate the Si-Si bond distance. BONUS : What structure does an FCC anionic lattice describe with cations in: a. all Td sites b. 1/2 Td sites c. all Oh sites d. 1/2 Oh sites (is this possible?)...
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This note was uploaded on 03/09/2010 for the course CHEM 142725201 taught by Professor Kaner during the Fall '08 term at UCLA.
- Fall '08