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Germanium has the same crystal structure ( diamond ) as S i , with a lattice constant of a = 0 . 5 6 4

Germanium has the same crystal structure (diamond) as Si, with a lattice constant of a=0.564nm.(20pts
(a) How many atoms are contained within a unit cell of a Ge crystal? (5pt4)
(b) Find the spacing (distance) between "1 earest-neighbor"' atoms in Ge. is (3)
pts)
nm=10-9m=10-7cm
(c) Calculate the surface density of Ge atoms per m2 on {110} planes. (5 pts)
(d) If the observed interplanar spacing is 0.327nm for Ge, please estimate
the possible corresponding (h,k,l) plane. SHOW your work! (5 pts)
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