Mineral:  Leucite KAlSi2O6

Sample No.: leucite.1

XRD Analysis:  Pure leucite according to XRD. (However, infrared 
hydroxyl bands indicate minor alteration to sericite.)

Chemistry:  Microprobe analysis indicated homogeneity within and 
between grains.  An average of 10 analyses indicates pure leucite:

SiO2	55.98
Al2O3	24.07
FeO	0.38
MgO	0.06
CaO	0.02
K2O	20.39
Na2O 	0.19
TiO2	0.06
Cr2O3	0.03
	_____
Total 	101.08
