Answers to Problem Set 7
1.  a.  Be =Y; 3 = n; Al =Y; 2 = n; Si = Z; 6 = p; 18 = q
b. Ca = X; Al = Y; 2(Al) = n; Si = Z; 2(Si) = p; 7(O) = q; (OH) = w; 2(OH) = r
2.
1  d
2  f
3  f
4  b
5  g
6  e
7  a
8  d
3.
1  g
2  f
3  e
4  d
5  a
6  g
4.
1  b
2  c
3  d
4  d
5	6. if both of the Z tetrahedra have a Si, then the
a  zeolites	ev. = 1 and no other polyhedra can attach to the
b  garnets	O.  However, if at least one of the 2  Z tetrahedra are
c  labradorite	Al, then the ev = 3/4 and more polyhedra can share
d  sorosilicates	on that O-----prove this by Pauling's rule # 2
e  pyroxenes
f   emerald
g  hornblende
h  rubellite