846 



BOTANY AND PHARMACOGNOSY. 



PiPERiNE. Crystals from hot alcoholic solutions (Fig. 340). 

 Monoclinic : a:b = 0.9837 : i ; (3 = 109 37^'.* 

 Forms observed : Clinopinacoid (010); orthopinacoid (100); 

 and base (001). 



Fig. 340. Piperine: monoclinic crystals, mostly on the clinopinacoid, showing the oblique 

 terminations, obtained from hot alcoholic solution. 



Angles: Angle looAooi =70^ (70 22^0- 



Habit : Tabular on the clinopinacoid, elongated along the c 

 axis. The smaller crystals are rod-like or needle-like. In the 

 larger crystals the ratio of length to width may become as small 

 as 2 : I or less. These larger crystals are often thicker in the 



I 



* F. M. Jaeger, Zeitschr. f. Krystallog., 1907-08, 44, p. 574. 



