416 
DE. A. W. HOFMAXN' OX THE PHOSPHOEUS-BASES. 
Eig. 1. 
“ System monoclinic : — 
10 0, 10 1 = 34° 25'; 1 01, 0 01 = 48° 48'; 111, 01 0=50° 16'. 
Forms observed: — 
10 0, 010, 001, 110, oil. 111 (Fig. I). 
Angles. 
Calculated. 
Obserred. 
In hemitropic crj'stals. 
In simple crystals. 
10 0, 010 
0 i 
90 
O / 
O 1 
1 0 0, 001 
= 
83 13 
82 57 
83 23 
10 0, 110 
47 39 
47 48 
47 42 
10 0 , oil 
= 
86 10 
86 10 
10 0, 111 
= 
50 37 
50 21 
010, 0 01 
= 
90 
010, 110 
= 
42 21 
42 19 
010 , oil 
= 
34 24 
010, 111 
= 
50 16 
0 01, 110 
85 26 
85 18 
85 23 
0 01 , oil 
= 
55 36 
55 44 
0 01, 111 
= 
59 34 
59 39 
1 1 0, T 1 0 
= 
84 42 
84 29 
84 38 
110 , oil 
= 
52 45 
110, oiT 
61 55 
110, 111 
25 52 
25 30 
110, Til 
87 49 
oil, oil 
68 48 
68 32 
oil. 111 
35 33 
35 44 
oil, TlT 
= 
76 3 
111, TlT 
100 32 
100 37 
According to Naumann : — 
a:h\ c= 1-3312 : 1 : 0 9052 ; y=83° 13'. 
Forms observed : — 
CO P OO, CO P CO, OP, CO P, P CO, — P. 
According to Weiss : — 
«: c=l : 0-9052 : 1-3312; ffoc=96° 47'. 
