MONOCLINIC DOUBLE SELENATES OF THE NICKEL GROUP. 
Interfacial Angles of Rubidium Nickel Selenate. 
Angle. 
No. of 
measurements. 
Limits. 
Mean 
observed. 
Calculated. 
r ac =( 100 ):( 001 ) 
o / o / 
o / 
74 40 | 
as =( 100 ):( 101 ) 
— 
— 
—- 
45 36 
sc =( 101 ): ( 001 ) 
— 
— 
— 
29 4 
cr = ( 001 ) : ( 201 ). 
12 
63 50- 64 7 
63 59 
63 58 
cs =( 001 ): ( 101 ) 
— 
— 
— 
38 38-5 
sr =( 101 ):( 201 ) 
— 
_ •>. 1 , 
— 
25 19-5 
r'a = ( 201 ) : ( 100 ) 
— 
- bEhbCK 
— 
41 22 
[r'c =( 201 ): ( 001 ) 
12 
115 49-116 10 
116 1 
116 2 
fap =( 100 ):( 110 ) 
— 
— 
— 
35 30-5 
pp =( 110 ):( 120 ) 
— 
— 
— 
19 28 
p’b = ( 120 ) : ( 010 ) 
— 
— 
— 
35 1 • 5 
pp"' = (110): (130) 
— 
— 
— 
29 27 
p"'b = (130) : (010) 
— 
— 
— 
25 2 • 5 
pb =( 110 ):( 010 ) 
28 
54 23- 54 35 
54 29'5 
* 
pp =( 110 ):( 110 ) 
IS 
70 57- 71 4 
71 1 
71 1 
pp =( 110 ):( 110 ) 
18 
108 51-109 9 
108 59 
108 59 
f cq =( 001 ):( 011 ) 
23 
25 46- 25 58 
25 53 
25 53 
i 
qb =( 011 ): ( 010 ) 
19 
64 2- 64 14 
64 7 
* 
1 
l qq =(oii): (Oil) 
9 
128 9-128 21 
128 14 
128 14 
f (io =( 100 ): ( 111 ) 
— 
— 
— 
48 49 
oq =(111):(Oil) 
— 
— 
— 
27 25 
- - 
aq =(100):(Oil) 
— 
— 
— 
76 14 
qo =( 011 ):(Ill) 
— 
— 
— 
34 50 
[o'a =( 111 ): ( 100 ) 
— 
— 
— 
68 56 
\ co =( 001 ): ( 111 ) 
— 
— 
— 
34 40 
op =( 111 ): ( 110 ) 
— 
— 
— 
42 54 
cp =( 001 ): ( 110 ) 
40 
77 27- 77 39 
77 34 
* 
• 
po = ( 110 ):( 111 ) 
10 
57 27- 57 44 
57 31 
57 34 
o'c =( 111 ): ( 001 ) 
10 
44 33 - 45 7 
44 55 
44 52 
pc =( 110 ):( 001 ) 
40 
102 17-102 34 
102 26 
102 26 
f bn =( 010 ):( 121 ) 
— 
— 
— 
54 18 
J 
no = ( 121 ):( 111 ) 
— 
— 
— 
15 56 
1 
bo = ( 010 ):( 111 ). 
— 
— 
— 
70 14 
[os =( 111 ): ( 101 ) 
— 
— 
— 
19 46 
[bo =( 010 ):(Ill) 
9 
65 9-65 14 
65 11 
65 12 
os' =( 111 ): ( 101 ) 
— 
— 
24 48 
[ o'o' =(111): (III) 
o 
49 38- 49 40 
49 39 
49 36 
r sq =( 101 ): (Oil) 
— 
— 
— 
38 9 
qp =( 011 ):( 110 ) 
17 
86 31- 86 40 
86 35 
86 34 
< 
1 
ps =( 110 ):( 101 ) 
— 
— 
55 17 
L pq =(110):(Oil) 
17 
93 15- 93 33 
93 25 
93 26 
(sq =(101):(Oil) 
— 
— 
— 
45 21 
| qn =( 011 ):( 121 ) 
— 
— 
— 
26 42 
\np =( 121 ):( 110 ) 
— 
— 
— 
3o *4 -4 
1 qp =( 011 ):( 110 ) 
18 
63 12- 63 31 
63 24 
63 26 ; 
\ps =( 110 ): ( 101 ) 
— 
— 
— 
l 1 10 
[pq =(110):(Oil) 
18 
116 27-116 43 
116 35 
116 34 
fro' =( 201 ): (Ill) 
6 
34 40- 34 56 
34 47 
34 52 
op =( 111 ):( 110 ) 
6 
92 45- 92 56 
92 51 
92 47-5 
< 
pr =( 110 ):( 201 ) 
16 
52 11- 52 28 
52 20 - 5 
52 20-5 
l r'p =( 201 ): ( 110 ) 
15 
127 27-127 50 
127 38 
127 39-5 
Total number of 
measurements . 
363 
VOL. OCXVII.-A. - O 
Or oi 
