MONOCLINIC DOUBLE SELENATES OF THE IKON GROUP. 
431 
The following table institutes a complete comparison of the crystal angles of the 
four salts. A careful analysis of these results has been made, by tabulating all 
the differences between analogous angles of the four salts, and the results of the 
analysis are concentrated in the short table which follows that of the angles. 
Comparison of the Interfacial Angles. 
Angle. 
KFe selenate. 
- RbFe selenate. 
CsFe selenate. 
AmFe selenate. 
[ ac = (100):(001) 
o t 
76 10 
o / 
75 3 
o / 
73 58 
o / 
73 51 
as = (100):(101) 
46 46 
46 2 
45 9 
45 13 
sc = (101): (001) 
29 24 
29 1 
28 49 
28 38 
J 
cr' = (001): (201) 
62 38 
63 24 
64 29 
64 17 
cs' = (001) : (101) 
37 58 
38 15 
38 51 
38 36 
sY = (TO1):(201) 
24 40 
25 9 
25 38 
25 41 
[r'a = (201): (100) 
41 12 
41 33 
41 33 
41 52 
f ap = (100):(110) 
36 1 
35 39 
35 7 
35 30 
pp' = (110):(120) 
p'b = (120): (010) 
19 28 
19 28 
19 28 
19 28 
- 
34 31 
34 53 
35 25 
35 2 
pb =(110):(010) 
53 59 
54 21 
54 53 
54 30 
pp’" = (110): (130) 
f'b = (130): (010) 
29 21 
29 25 
29 31 
29 27 
24 38 
24 56 
25 22 
25 3 
fcq — (001) : (Oil) 
26 6 
25 47 
25 34 
25 44 
t qb = (Oil):(010) 
63 54 
64 13 
64 26 
64 16 
f ao = (100):(111) 
49 59 
49 13 
48 19 
48 25 
oq =(111):(Oil) 
27 37 
27 21 
27 16 
27 5 
<1 
aq =(100):(Oil) 
77 36 
76 34 
75 35 
75 30 
qo' = (Oil): (111) 
34 12 
34 28 
35 3 
34 48 
[o'a = (Ill): (100) 
68 12 
68 58 
69 22 
69 42 
[ co = (001): (111) 
35 9 
34 38 
34 18 
34 14 
op = (111): (110) 
43 42 
43 16 
42 39 
42 41 
cp = (001): (110) 
78 51 
77 54 
76 57 
76 55 
po = (110):(111) 
56 54 
57 39 
58 7 
58 13 
[ o' c = (111): (001) 
44 15 
44 27 
44 56 
44 52 
J 
r bo = (010):(111) 
69 49 
70 12 
70 34 
70 24 
[os =(111): (101) 
20 11 
19 48 
19 26 
19 36 
[bo' = (010) : (Ill) 
65 17 
65 20 
65 21 
65 7 
< 
[oV = (Ill):(101) 
24 43 
24 40 
24 39 
24 53 
\sq =(101): (011) 
38 31 
38 3 
37 47 
37 45 
qp =(011):(110) 
85 8 
86 17 
87 27 
87 15 
[ps = (110) : (101) 
56 21 
55 40 
54 46 
55 0 
f s'q = (101): (Oil) 
44 55 
45 0 
45 22 
45 15 
< 
qp = (Oil):(110) 
64 23 
63 45 
63 8 
62 52 
[ps = (110):(101) 
70 42 
71 15 
71 30 
71 53 
f r'o' = (201) : (Ill) 
34 22 
34 39 
34 59 
35 9 
< 
dp = (111):(110) 
93 7 
92 48 
92 46 
92 10 
I 
[pr = (110):(201) 
52 31 
52 33 
V 
52 15 
52 41 
