MONOCLINIC DOUBLE SELENATES OF THE NICKEL GROUP. 
201 
Interfacial Angles of Potassium Nickel Selenate. 
Angle. 
No. of 
measurements. 
Limits. 
Mean 
observed. 
Calcu¬ 
lated. 
Diff. ! 
Values of 
vom Rath. 
fac =(100): (001) 
© / © / 
© / 
75 33 
' 
o / 
75 7 
as =(100):(101) 
— 
— 
— 
46 15 
— 
— 
sc =(101): (001) 
— 
— 
— 
29 18 
— 
— 
.cr' =(001): (201) 
W =(001): (101) 
20 
63 20- 63 28 
63 24 
63 13 
11 
63 35 
■ — 
— 
— 
38 16 
— 
— 
s't = (101) : (201) 
— 
— 
— 
24 57 
— 
— 
r'a = (201) : (100) 
— 
— 
— 
41 14 
— 
— 
r'c =(201): (001) 
20 
116 32-116 41 
116 36 
116 47 
11 
— 
fop =(100): (110) 
— 
— 
— 
35 54 
— 
— 
pp' =(110):(120) 
| p'b = (120) : (010) 
— 
— 
— 
19 28 
— 
— 
— 
— 
— 
34 38 
— 
— 
pp'" = (110): (130) 
1 p'"b = (130) : (010) 
— 
— 
— 
29 22 
— 
— 
— 
— 
— 
24 44 
— 
— 
pb =(110):(010) 
— 
— 
— 
54 6 
— 
— 
pp = (110):(110) 
22 
71 41- 71 58 
71 48 
* 
— 
71 32 
pp =(110):(110) 
22 
108 0-108 24 
108 12 
108 12 
0 
— 
[cq =(001):(Oil) 
42 
25 54- 26 17 
26 6 
26 6 
0 
26 0 
<| gb =(011): (010) 
— 
— 
— 
63 54 
— 
U<7 =(0H): (Oil) 
18 
127 46-127 53 
127 48 
* 
— 
— 
f ao =(100): (111) 
— 
— 
— 
49 30 
— 
— 
oq =(111):(Oil) 
— 
— 
— 
27 33 
— 
j 
\aq =(100): (Oil) 
— 
— 
— 
77 3 
— 
— 
qo' =(011): (Ill) 
[ o'a =(111): (100) 
— 
— 
— 
34 26 
— 
— 
— 
— 
— 
68 31 
— 
— 
[co =(001): (111) 
— 
— 
— 
35 0 
— 
— 
op =(111):(110) 
— 
— 
— 
43 20 
— 
— 
J cp =(001):(110) 
38 
78 12- 78 28 
78 20 
— 
77 58 
| po' =(110): (111) 
o'c =(111): (001) 
— 
— 
— 
57 7 
— 
— 
— 
— • 
— 
44 33 
— 
— 
pc =(110):(001) 
38 
101 29-101 47 
101 40 
101 40 
0 
Cbn =(010):(121) 
— 
— 
— 
53 50 
■— 
— 
J no =(121):(111) 
— 
— 
— 
16 6 
— 
S bo =(010):(111) 
— 
■— 
— 
69 56 
— 
— 
los =(111): (101) 
— 
— 
20 4 
— 
[bo =(010): (Ill) 
— 
— 
— 
65 10 
— 
— 
i loV =(111): (101) 
— 
— 
— 
24 50 
Csq =(101):(Oil) 
J qp =( 011 ):( 110 ) 
28 
_ 
85 23- 85 44 
85 35 
38 27 
85 37 
55 56 
94 23 
2 
86 7 
bps = (110) : (101) 
l Pi =(H0): (Oil) 
28 
_ 
94 13- 94 38 
94 25 
2 
— 
f sq =(101):(Oil) 
— 
. 
■— 
45 10 
26 52 
37 3 
63 55 
70 55 
116 5 
qn =(011):(121) 
— 
— 
— 
J np =(121):(110) 
1 qp =( 011 ):(110) 
31 
63 45- 64 5 
63 55 
0 
63 36 
ps' =(110): (101) 
pq =(110):(Oil) 
31 
115 57-116 12 
116 5 
0 
— 
[r'o =(201) :(I11) 
\o'p =(111): (110) 
W =(110):(201) 
[_r'p =(201): (110) 
38 
38 
52 10- 52 30 
127 32-127 52 
52 22 
127 39 
34 38 
92 54 
52 28 
127 32 
6 
7 
52 25 
Total number of 
■ 
measurements . 
414 
| 
2 f 2 
