MONOCLINIC DOUBLE SELENATES OF THE IRON GROUP. 419 
Interfacial Angles of Caesium Ferrous Selenate. 
Angle. 
No. of 
measurements. 
Limits. 
Mean 
observed. 
Calcu¬ 
lated. 
Diff. 
f ac =(100):(001) 
_ 
o / o V 
o / 
7°3 58 
/ 
_ I 
as = (100):(101) 
— 
— 
— 
45 9 
— 
sc =(101): (001) 
— 
— 
— 
28 49 
— 
cr’ =(001): (201) 
22 
64 16- 64 43 
64 32 
64 29 
3 
cs' = (001) : (101) 
— 
— 
— 
38 51 
sV = (101):(201) 
— 
— 
— 
25 38 
— 
r'a =(201): (100) 
— 
— 
— 
41 33 
— 
[r'c = (201): (001) 
22 
115 17-115 45 
115 28 
115 31 
3 
lap =(100): (110) 
— 
— 
— 
35 7 
— 
pp' = (110): (120) 
— 
— 
— 
19 28 
— 
pb =(120): (010) 
— 
— 
— 
35 25 
— 
pp"’ = (110) : (130) 
— 
— 
— 
29 31 
— 
p"b = (130) : (010) 
— 
— 
— 
25 22 
— 
pb = (110):(010) 
8 
54 43- 55 1 
54 52 
54 53 
1 
pp =(110):(110) 
19 
70 6- 70 23 
70 14 
* 
[pp =(H0): (110) 
19 
109 35-109 57 
109 46 
109 46 
0 
[cq =(001): (Oil) 
37 
25 20- 25 42 
25 34 
* 
i 
qb =(011):(010) 
8 
64 23- 64 39 
64 28 
64 26 
2 
1 
L qq =(oii): (on) 
18 
128 44-129 2 
128 52 
128 52 
0 
\ao =(100):(111) 
— 
— 
— 
48 19 
— 
oq = (111):(Oil) 
— 
— 
— 
27 16 
— 
aq =(100):(Oil) 
— 
— 
— 
75 35 
— 
qo' =(011): (Ill) 
— 
— 
— 
35 3 
— 
[o'a =(111): (100) 
— 
— 
— 
69 22 
— 
\ co = (001): (111) 
— 
' — 
— 
34 18 
— 
op = (111): (110) 
— 
— 
— 
42 39 
— 
cp = (001): (110) 
40 
76 48- 77 4 
76 57 
* 
— 
1 
po =(110):(111) 
4 
58 3- 58 15 
58 11 
58 7 
4 
o'e = (111): (001) 
4 
44 46- 44 57 
44 52 
44 56 
4 
[|>c =(110): (001) 
40 
102 50-103 13 
103 3 
103 3 
o • 
[bn = (010) : 
121) 
— 
— 
— 
54 47 
— 
J 
no = (121) :< 
>!!!) 
— 
— 
— 
15 47 
— 
1 
bo = (010) : ( 
Jill) 
— 
— 
— 
70 34 
— 
Los = (111): | 
[101) 
— 
— 
— 
19 26 
— 
f bo' =(010): (Ill) 
2 
65 21- 65 27 
65 24 
65 21 
3 
oV =(111):(101) 
— 
— 
— 
24 39 
— 
. 
[oo' = (111)-.(III) 
1 
— 
49 14 
49 18 
4 
[sq =(101): (Oil) 
— 
— 
— 
37 47 
— 
J 
qp = (Oil):(110) 
40 
87 21- 87 43 
87 30 
87 27 
3 
ps = (110):(101) 
— 
— 
— 
54 46 
— 
[pq = (110) : (Oil) 
40 
92 19- 92 37 
92 30 
92 33 
3 
\s’q =(101): (Oil) 
— 
— 
— 
45 22 
— 
qn =(011):(121) 
— 
— 
— 
26 33 
— 
up = (121):(110) 
— 
— 
— 
36 35 
— 
qp =(011):(110) 
40 
62 49- 63 13 
63 6 
63 8 
2 
ps’ = (110): (101) 
— 
— 
— 
71 30 
— 
l pq =(110): 
(Oil) 
40 
116 44-117 4 
116 54 
116 52 
2 
fro = (201): 
(Ill) 
6 
34 51- 35 14 
34 58 
34 59 
1 
> 
op = (Ill): 
(110) 
6 
92 40- 92 51 
92 45 
92 46 
1 
s 
pr' = (110) : 
(201) 
40 
52 1- 52 28 
52 16 
52 15 
1 
[ jr’p = (201) : 
(110) 
39 
127 32-127 56 
127 44 
127 45 
1 
Total number of 
measurements . . 
495 
3 K 
VOL. CCXVIII.-A. 
