MONOCLINIC DOUBLE SULPHATES CONTAINING AMMONIUM. 
35 
Interfacial Angles of Ammonium Coppei’ Sulphate. 
Angle. 
No. of 
measure¬ 
ments. 
Limits. 
Mean 
observed. 
Calcu¬ 
lated. 
Diff. 
Values of 
Miller. 
far, =(100): (001) 
_ 
0/0/ 
o / 
73 51 
/ 
o / 
73 54 
as =(100):(101) 
— 
—- 
— 
45 5 
— 
— 
sc =(101): (001) 
— 
— 
_ 
28 46 
— 
— 
cr =(001): (201) 
6 
64 37- 64 42 
64 38 
64 33 
5 
1 64 54 
cs' = (001) : (101) 
— 
— 
— 
38 51 
— 
— 
s'r = (101): (201) 
— 
■—- 
— 
25 42 
— 
— 
r'a = (201) : (100) 
— 
—• 
41 36 
— 
— 
[r'c =(201): (001) 
3 
115 17-115 23 
115 22 
115 27 
5 
— 
\ a/p =(100): (110) 
— 
— 
35 38 
■— 
— 
pp’ = (HO): (120) 
3 
19 26- 19 26 
19 26 
19 28 
2 
— 
p'b = (120) : (010) 
2 
34 42- 35 1 
34 52 
34 54 
2 
— 
p'p" = (120) : (130) 
1 
9 53 
9 58 
5 
— 
pf = (HO): (130) 
1 
— 
29 24 
29 26 
2 
— 
p'"b = (130) : (010) 
1 
— 
24 58 
24 56 
2 
.- 
• 
pb =(110):(010) 
24 
54 8- 54 37 
54 22 
* 
— 
-— 
[pp =(H0): (110) 
19 
71 4- 71 27 
71 16 
71 16 
0 
71 4 
fcq =(001): (Oil) 
29 
25 34- 26 16 
25 57 
* 
— 
26 10 
1 
[ qb =(011): (010) 
29 
63 40- 64 27 
64 3 
64 3 
0 
— 
fao =(100): (111) 
— 
— 
— 
48 21 
— 
— 
oq =(111): (Oil) 
1 
— 
27 8 
27 10 
2 
— 
\aq =(100):(Oil) 
— 
— 
75 31 
— 
— 
\qo =(011): (111) 
1 
34 59 
34 54 
5 
— 
{o'a =(111): (100) 
— 
— 
— 
69 35 
— 
69 11 
' co =(001): (111) 
4 
34 12- 34 32 
34 26 
34 24 
2 
op =(111): (110 
5 
42 21- 42 29 
42 27 
42 32 
5 
•—- 
1 cp =(001): (110) 
40 
76 41- 77 12 
76 56 
* 
— ■ 
— 
\po =(110): (111) 
1 
— 
57 52 
57 59 
7 
— 
[o'c = (111): (001) 
1 
— 
45 12 
45 5 
7 
45 31 
'bn =(010): (121) 
— 
— 
— 
54 21 
— 
— 
J 
no = (121):(111) 
— 
— 
— 
15 55 
— 
— 
bo =(010): (111) 
1 
— 
70 17 
70 16 
1 
— 
js =(111):(101) 
— 
_ 
19 44 
— 
-—■ 
'bo = (010):(Ill) 
1 
64 57 
64 57 
0 
— 
o’s = (Ill) : (101) 
— 
— 
-— 
25 3 
— 
— 
.o’o’ =(111): (III) 
— 
— 
— 
50 6 
— 
■—• 
'sq =(101): (Oil) 
— 
— 
— 
37 59 
— 
— 
qp =(011):(110) 
17 
86 38- 87 23 
87 4 
87 2 
2 
■—- 
1 
ps = (110):(101) 
—- 
— 
■—- 
54 59 
— 
— 
jpq =(110): (Oil) 
16 
92 40- 93 7 
92 56 
92 58 
9 
JU 
_ 
s'q = (101) : (Oil) 
— 
_ 
45 33 
— 
— 
qn =(011): (121) 
■—- 
— 
— 
26 26 
— 
— 
np = (121):(110) 
— 
— 
— 
36 18 
— 
— 
qp =(011):(110) 
21 
62 32- 62 57 
62 44 
62 44 
0 
— 
ps' = (110) : (101) | 
— 
— 
— 
71 43 
-— • 
— 
M = (110):(Oil) 
20 
117 0-117 32 
. 117 16 
117 16 
0 
— 
j 
Vo' = (201) : (Ill) 
1 
— 
35 12 
35 16 
4 
— 
dp =(111): (110 ) 
1 
— 
92 16 
92 9 
7 
— 
.pr =(110): (201) 
7 
52 23- 52 42 
52 31 
52 35 
4 
— 
Total number of 
measurements . . 
256 
