DE. A. W. HOFMANN ON THE PHOSPHOEHS-BASES 
457 
I. 0’4593grm. of platinum-salt gave 0'3854grm. of carbonic acid and 0‘1880grm. of 
water, 
II. 0*5397 grm. of platinum-salt gave 0*4515 grm. of carbonic acid and 0*2157 grm. of 
water, 
III. 0*549 grm. of platinum-salt, fused with carbonate of sodium, gave 0*785 grm. of 
a mixture of bromide and chloride of silver and 0*1253 grm. of platinum. 
These numbers fix the formula 
Q Br P Pt CI3 = [(ft H3 Br) (ft P] Cl, Pt CI3. 
Theory. 
A 
Experiment. 
A 
r 
r 
I. 
11 . 
III.’ 
Cs 
96 
22*26 
22*88 
22*81 
19 
4*41 
4*55 
4*44 
P 
31 
7*19 
Br 
CI 3 
80 
106*5 
} -- 
[ 
43*11^- 
Pt 
98*7 
22*89 
• 
22*82 
431*2 
100*00 
As I have already mentioned, this platinum-salt can easily be obtained in fine long 
needles ; they exhibit, however, but rarely well-formed terminal faces. Only once I suc- 
ceeded in getting them somewhat better developed. These crystals were examined by 
Quintixo Sella mth the following results : — 
“ System monoclinic : — 
10 0, 101 = 55° 59'; 0 0 1, 1 01 = 33° 3'; 010, 111 = 60° 37'. 
Forms observed: — 
10 0, 010, 110, 101, 101, Oil, 111, Til, 211 (Fig. 31). 
Fig. 31. 
Angles. 
10 0, 010 
10 0, 110 
10 0 , 101 
1 0 0, T 0 1 
10 0 , oil 
10 0 , 111 
100, Til 
10 0 , 211 
Calculated. 
o i 
90 0 
45 55 
55 59 
122 40 
89 12 
60 50 
117 56 
137 4 
Observed. 
O i 
45 57 
55 51 
122 40 
89 12 
61 1 
117 50 
136 54 
* With tbe admissible assumption that the compound contains 3 equivs. of cblorine for 1 equiv. of 
bromine. 
3 p 
MDCCCLX. 
