PYROXENE. 



N° 5 



P = (b\ l/* h*) = a 2 



s = (d*d*'h') 



a = (ff b V3 h 1 )=a 3 



e = (V. d J *y) 



t = (b* d\^) 



£ = (d^-iS* y) 



cp = j^* **^ 



Y = (d*> b**j9â) 



,;„,- 



