fy 
Antimonytrichloride: SbC. 
ie ls: | 
v Maximum Pressure H | 
| 3 - CS ee | Molecular | 
bem ere 
ae ‚in mm. mer- ; | oa | gravity ‚energy » in 
| 55 cury of | in Dynes Erg, per cm’ 4° Erg per cm?. 
RE Loen 
74.5 | 1.803 2403.7 49.6 | apie 957.4 
90.4 1.739 2319.6 47.8 2.639 930.3 
105 1.678 2242.5 46.0 2.606 902.8 
| 120.6 1.616 2148.0 44.3 Avon 877.3 
NR We 1.556 L 2074.4 42.6 2.534 851.8 
149.8 1.506 2008 .4 41.2 2.005 830.2 
*165 1.342 1789.2 39.6 2.471 805.2 
| *178 l 
„299 | 1132.5 38.3 | 2.441 785.2 
| 
Molecular weight: 226,58. Radius of the Capillary tube: 0.04242 cm. ; in the 
observations indicated by *, it was: 0.04583 cm. 
Depth: 0.1 mm. 
The beautifully crystallised compound melts at 73°.2 C.; under a pressure 
of 20 mm. it boils at 111° C. 
The specific gravity can be calculated (Kopp) from the equation : Ajo = 
= 2.6712 —0.002166 (¢ — 75°) — 0.00000072 (¢ — 75°)?, 
The temperature-coefficient of » is fairly constant and about 1,66 Erg 
per degree. 
8. 
Bismuthchloride : B/C/s. 
Maximum Pressure H | | 
ae 
5 cies lers’ iN da Weare SIAN aes 0G le ee i Molecular 
5 | tre ol A DEE 1 Ger 
So |. tension zine vite d ; 
eg ein nm, HIer. | En gravity Ago | energy #in 
En cury or “in Dynes ..\| sp ; Erg per cm? 
vo 
= oe 
lee ae ae ey 3028 | 66.2 3.811 1254.4 
304 | 2.119 2825 61.8 3.135 | 1187.0 
331 | 1.994 2658 58.1 3.682 1126.6 
353 — | 1.896 | 2528 55.3 3.621 1084.3 
382 | 
1.782 | 2376 52.0 3.554 1032.4 
Molecular weight: 314.38. Radius of the Capillary tube: 0.04363 cm. At 18°C. 
Depth: 0.1 mm. 
The salt, which melts at 230° C., was purified by distillation in a stream 
of dry hydrochloric acid. Above 400? C. no reliable measurements 
were possible, because of the attacking of the platinum capillary tube by the 
vapours. The measurements can only be considered as approximative 
ones, because of the partial decomposition of the BiCl, by the air, which 
cannot be avoided under these circumstances. The specific weight at aT Neen OB 
was: 3.851; at 281° C.: 3.789; at 304° C. 3.735. At f° C. it is deo = 3 860— 
0.00232 (t—250°). The temperature-coefficient of » is between 271° and 831° C. 
about 2.14 Erg; between 331° and 353° C.: about 1.92 Erg; and between 
353° and 382° C.: 1.78 Erg. per degree Celsius. 
26 
Proceedings Royal Acad. Amsterdam. Vol. XIX. 
