MONOCLINIC DOUBLE SULPHATES CONTAINING AMMONIUM 
25 
Interfacial Angles of Ammonium Manganese Sulphate. 
No. of 
measure¬ 
ments. 
Mean 
Calcu- 
Values of 
Angle. 
Limits. 
Diff. 
observed. 
bated. 
M. & It. j 
G. & S. 
ac 
= (100):(001) 
__ 
_ 
o / 
73 9 
72 58 
o / 
71 42 G. 
as 
= (100):(101) 
-— 
— 
— 
45 1 
— 
— 
— 
sc 
= (101):(001) 
— 
— 
— 
28 8 
— 
— 
— 
1 
cr 
= (001):(201) 
10 
64 7- 64 25 1 
64 15 
64 19 
4 
64 18 
— 
cs 
= (001):(101) 
— 
— 
— 
38 20 
— 1 
— 
■ — 
sr 
= (101):(201) 
— 
— 
— 
25 59 
-— 
— 
— 
rci 
= (201):(TOO) 
— 
— 
— 
42 32 
— 
42 6 
— 
re 
= (201):(001) 
10 
115 33-116 0 
115 45 
115 41 
4 
— 
— 
r ap 
pp 
= (100):(110) 
— 
-- 
— 
35 18 
— 
35 40 
— 
= (110):(120) 
8 
19 17- 19 33 
19 27 
19 28 
1 
19 17 
— 
p’l 
= (120):(010) 
2 
35 8- 35 22 
35 15 
35 14 
1 
35 25 
—- 
PP" 
= (110) :(130) 
— 
— 
— 
29 29 
— 
— 
— 
p"'b 
= (130):(010) 
i 
— 
25 19 
25 13 
6 
25 45 
— 
pb 
= (110):(010) 
40 
54 36- 54 55 
54 42 
* 
— 
54 57 
— 
[pp 
= (110):(110) 
21 
70 22- 70 47 
70 35 
70 36 
1 
70 16 
f 70 35 G. 
I 70 32 S. 
rcq 
= (001):(Oil) 
29 
25 4- 25 33 
25 16 
* 
— 
24 35 
f24 55 G. 
I 25 13S. 
L qb 
= (Oil):(010) 
18 
64 31- 64 48 
64 44 
64 44 
0 
— 
— 
ao 
= (100) : (HI) 
— 
— 
— 
48 8 
— 
— 
— 
oq 
= (111) : (Oil) 
— 
— 
— 
26 40 
— 
— 
— 
aq 
= (100):(Oil) 
— 
— 
— 
74 48 
— 
— 
— 
qo 
= (Oil):(111) 
1 
— 
34 34 
34 38 
4 
— 
— 
o'a 
= (Ill):(TOO) 
— 
— 
— 
70 34 
— 
— 
— 
f CO 
= (001):(111) 
1 
— 
33 41 
33 38 
3 
— 
— 
1 op 
= (HI) : (110) 
1 
—- 
42 40 
42 41 
1 
— 
— 
I C P 
= (001):(110) 
40 
76 13- 76 30 
76 19 
* 
— 
— 
76 24 S. 
1 po 
= (110): (111) 
21 
58 49- 59 24 
59 4 
59 10 
6 
— 
— 
\ V°' c 
= (111):(001) 
20 
44 27- 44 52 
44 38 
44 31 
7 
— 
— 
'bn 
= (010):(121) 
— 
— 
— 
55 6 
— 
— 
-— 
J 
no 
- (121): (111) 
— 
— 
15 40 
-— 
— 
— 
s 
bo 
= (010):(111) 
— 
— 
— 
70 46 
— 
— 
— 
Los 
= (111): (101) 
_ 
— 
— 
19 14 
— 
— 
— 
[bo 
= (010):(Ill) 
1 
— 
65 16 
65 21 
5 
— 
— 
< 
dd 
= (Ill):(101) 
-— 
— 
— 
24 39 
— 
— 
— 
. o'o' 
= (HI) : (HI) 
1 
— 
49 25 
49 18 
7 
— 
— 
f S( L 
= (101):(Oil) 
— 
— 
— 
37 6 
— 
•— 
— 
< 
qp 
= (Oil):(110) 
24 
87 57— 88 28 
88 9 
88 8 
i 
— 
— 
> 
ps 
= (110):(101) 
—- 
- 
— 
54 46 
— 
— 
— 
Ipq 
= (110):(Oil) 
24 
91 40- 92 4 
91 50 
91 52 
2 
— 
— 
[s'q 
= (101):(Oil) 
— 
— 
— 
44 49 
— 
— 
— 
1 9: n 
= (Oil):(121) 
— 
—- 
— 
26 3 
— 
— 
— 
_A- 
= (121):(110) 
— 
— 
— 
36 31 
— 
— 
— 
= (Oil):(110) 
25 
62 24- 62 42 
62 33 
62 34 
i 
— 
— 
1 K 
= (110):(101) 
— 
— 
— 
72 37 
— 
— 
— 
l n 
= (110):(Oil) 
24 
117 23-117 41 
117 28 
117 26 
2 
- 
-— 
r/d 
= (201):(Ill) 
11 
34 51- 35 24 
35 7 
35 13 
6 
35 25 
— 
< 
°'P 
= (Ill):(110) 
16 
91 34- 92 5 
91 50 
91 45 
5 
91 47 
— 
Ik 
= (110):(201) 
24 
52 52- 53 26 
53 6 
53 2 
4 
52 22 
-- 
Total number of 
measurements . 
37 3 
VOL. ccxvi.—-A. 
E 
