a) Calculate the packing factor of SiC unit cell (a zinc blende structure material) (15 points)
b) Calculate the packing factor of Cu, a FCC metal. (9 points)
c) Compare the packing factor of SiC and Cu and explain why it makes sense in terms of bonding. (6 points)
Electronegativity
Atomic Radius (nm)
Ionic Radius (nm)
Si (silicon)
1.8
0.118
0.040 (Si+4)
C (carbon)
2.5
0.071
0.016 (C+4)
Cu (copper)
2.4
0.128
0.096(Cu+1)
