MONOCLINIC DOUBLE SELENATES OF THE IRON GROUP. 
413 
Interfacial Angles of Rubidium Ferrous Selenate. 
Angle. 
No. of 
measurements. 
Limits. 
Mean 
observed. 
Calculated. 
Diff. 
[ac =(100): (001) 
3 
75 2- 75 9 
75 6 
o / 
75 3 
3 
as =(100):(101) 
— 
— 
— 
46 2 
sr =(101): (001) 
--J* 
— 
— 
29 1 
cr' =(001): (201) 
19 
63 29- 63 49 
63 37 
63 24 
13 
cs = (001): (101) 
— 
— 
— 
38 15 
sY = (101):(201) 
— 
— 
— 
25 9 
r'a =(201): (100) 
2 
41 22- 41 26 
41 24 
41 33 
9 
[ r'c =(201): (001) 
17 
116 17-116 28 
116 23 
116 36 
13 
[ap =(100): (110) 
8 
35 31- 35 48 
35 41 
35 39 
2 
pp =(110):(120) 
3 
19 24- 19 29 
19 27 
19 28 
i 
pb =(120): (010) 
3 
34 42- 34 54 
34 49 
34 53 
4 
pp" = (110): (130) 
— 
— 
— 
29 25 
p'"b = (130) : (010) 
— 
— 
— 
24 56 
— 
pb =(110):(010) 
36 
54 11- 54 30 
54 21 
* 
V p =(110):(110) 
16 
71 12- 71 33 
71 23 
71 18 
5 
[PP =(H0): (110) 
17 
108 25-108 44 
108 35 
108 42 
7 
\cq =(001): (011) 
38 
25 21- 25 59 
25 47 
* 
— 
qb =(011):(010) 
38 
64 0- 64 28 
64 13 
64 13 
0 
in =(011): (011) 
15 
128 12-128 38 
128 25 
128 26 
1 
\ao =(100): (111) 
— 
— 
— 
49 13 
- 
oq =(111):(Oil) 
— 
— 
— 
27 21 
-» 
aq =(100):(011) 
— 
— 
_ 
76 34 
— 
qo =(011): (Ill) 
— 
— 
— 
34 28 
_ 
[o'a =(111): (100) 
— 
— 
— 
68 58 
— 
t co =(001): (111) 
— 
— 
— 
34 38 
— 
op =(111): (110) 
— 
— 
— 
43 16 
— 
cp =(001): (110) 
40 
77 47- 78 8 
77 54 
* 
— 
po =(110):(111) 
13 
57 20- 57 46 
57 30 
57 39 
9 
o'c =(111): (001) 
14 
44 25- 44 47 
44 38 
44 27 
11 
J)C =(110): (001) 
39 
101 46-102 20 
102 6 
102 6 
0 
r bn = (010):(121) 
_ 
— 
— 
54 15 
I 
no =(121):(111) 
_ 
— 
— 
15 57 
1 
bo =(010): (111) 
— 
— 
— 
70 12 
— 
=(111): (101) 
— 
— 
— 
19 48 
— 
'bo =(010):(Ill) 
18 
65 5- 65 21 
65 13 
65 20 
7 
os' =(111): (101) 
— 
—■ 
— 
24 40 
— 
Jo =(111): (111) 
6 
49 24- 49 35 
49 31 
49 21 
10 
r sq =(101):(Oil) 
— 
— 
— 
38 3 
— 
J 
qp = (011):(I10) 
35 
86 1- 86 27 
86 11 
86 17 
6 
i 
ps =(110):(101) 
— 
-— 
— 
55 40 
— 
<P! =(H0): (Oil) 
36 
93 29- 94 3 
93 49 
93 43 
6 
\sq =(101):(Oil) 
— 
— 
— 
45 0 
— 
! qn =(011):(121) 
— 
— 
— 
26 43 
— 
\np =(121): (110) 
— 
— 
— 
37 2 
— 
1 IP =(0H): (110) 
35 
63 32- 63 59 
63 47 
63 45 
2 
ps =(110): (101) 
■— 
— 
■— 
71 15 
— 
[pq =(H0): (011) 
34 
116 2-116 28 
116 13 
116 15 
2 
VV =(201): (Ill) 
21 
34 28- 34 56 
34 43 
34 39 
4 
J 
op =(111):(110) 
20 
92 45- 93 6 
92 56 
92 48 
8 
1 
pr =(110):(201) 
37 
52 14- 52 31 
52 23 
52 33 
10 
j'p =(201): (110) 
36 
127 33-127 55 
127 37 
127 27 
10 
Total number of 
measurements . 
599 
3 i 2 
