Mineral:  Grossular Ca3Al2(Si04)3

Sample No.: grossul.2

XRD Analysis:  The sample is grossular but also yields a very small 
peak at 1.879 angstroms due to a trace of unknown contaminant.

Chemistry:  Microprobe analysis showed hand-picked grains to 
berelatively homogeneous, with only about a 1 wt % variation in FeO 
and CaO.  An average of 11 analyses indicates that this sample is a 
solid solution of grossulerite with andradite:

SiO2	38.84
Al2O3	17.95
FeO	7.08
MgO	0.15
CaO	35.81
K2O	0.03
Na2O	0.05
TiO2	0.70
MnO2	0.51
	_____
Total	101.11
