361 
Monoclinic-prismatic. 
a:h:-c = 0,7466: 1 :1,5713. 
B= 8 397 
Forms observed: c= {001}, 
predominant ; m= {110}, large 
and lustrous, shows sometimes 
a fine striation parallel to the | .* 
edges m:c; o= {111}, and : 
w = {111}, about equally large, 
but a little bit narrower than 
m; r= {101}, well reflecting ; 
s= {101}, somewhat smaller Fig. 12. Nitro-p-Toluene sulpho-piperidide. 
than 7, often absent ; ¢= {ok}, extremely narrow and not measurable 
only rarely present; b = {010}, small and narrow, dull; q = {011} 
clearly developed, yielding good reflexes. The aspect is often isome- 
metrical, or somewhat flattened parallel to {001}. 
Angular Values: Observed: Calculated: 
erm = (001) (111) =* _ T7911" = 
bro (Lr (UI 71 224 ae 
mic (110) (O01) —* 80552 = 
e:7r =(001):(101)= 55 28 55°34?/s’ 
rs = (101): (101)="" 501342. 5016's 
se (01): (001)= = 7401 74 9 
cog — (00E O11 Er SOEST 57 0% 
beg — 010) Olt) — 333 32 59!/s 
Oise (101) =" "35 35 41% 
m:m=(110):(110) = 72 22 72 24/2 
e:o = (001): 011)= 61°20 61 13% 
o:m=(111):(110)= 19 30 19 8 
meio = (LO (LI = 21574 21 57 
m:b =(110):(010) = 53 49 53 47% 
Very perfectly cleavable parallel to {001}, distinctly parallel to 
{110}. On {O01} diagonal extinction. 
The specific weight of the crystals at 15° C. was: 1,384; the 
equivalent-volume is therefore: 205,20, and the topical parameters 
become: Xi Wio= 4,2031 : 5,6259 : 8,8455. 
