356 
Angular Values: Observed: Calculated: 
a:¢ = (100)=(001) =" BESI = 
a:m= (100) : (130) =* 71 51% — 
a:r = (100): (203) =* 55 25 = 
c:r = (001): (203)= 36 24 36 24 
m:m= (130): (130) = 36 27 36 17 
c: w= (001) : (133) 50 8 49 29 
m: w= (130):(133)= 40 58 4175 
e:m= (001): (130) = + 89 24 89 26 
Very perfectly cleavable parallel to {O01}. 
On a and ec the extinction is normally orientated, but often of 
undulatory character, as the result of geometrical anomalies in the 
structure of the crystals. 
The specific gravity of the crystals was 1,450; the equivalent- 
volume is therefore: 168,27, and the topical parameters become: 
x4: W:@ = 5,4115 : 53169 : 5,8513. 
§ 10. VIII. Nitro-p-Toluene-sulpho-ethylnitramide. 
This substance, which melts at 76° C., can only rarely be obtained 
in measurable crystals. Those here investigated were deposited from 
a hot saturated solution in carbon tetrachloride by very slow eva- 
poration. 
Thin, yellow, 
with hemimorphie development (fig. 
very lustrous and transparent plates, 
8). 
commonly 
Fig. 8. Nitro-p-Toluene-sulpho-ethyl-nitramide. 
Monoclinic, probably sphenoidical. 
a:b:c=0,4812 :1: 0.8766; 
tene 
¢ = {001}, 
reflexes, 
Forms Observed: 
aera 
predominant, and very lustrous, o = 
ideal often with only a single plane; 
a = {100}, giving good mirror-images; 6 = {010}, often absent, but 
otherwise well reflecting: {705}, very narrow, often totally 
absent. The crystals often show oscillatory angular values, principally 
in the zone of the orthodiagonal, and multiple reflexes. The aspect 
ig tabular parallel to {001}, and strongly elongated towards the 
b-axis. 
yielding 
