Mineral:  Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6

Sample No.: augite.1

Locality:  Monteagle Township, Hostings Co., Ontario, Canada.

Source:  Smithsonian NMNH 117461.

XRD Analysis:  Pure augite.

Chemistry:  Microprobe analysis showed the sample to be fairly 
homogeneous, with a slight (+/- 0.5%) variation in alumina that 
cannot be balanced against any other chemical variation.  Analysis 
indicates WO50, EN13, FS37 composition. 
Average of 10 analyses:

SiO2 	49.92
Al2O3	0.92
FeO	19.26
MgO	22.21
K2O	0.03
Na2O	0.99
TiO2	0.06
MnO	1.62
	_____
Total	100.34
