Mineral:  Heulandite (Na,Ca)2-3Al3(Al,Si)2Si13O36.12H2O

Sample No.: heulan.2

XRD Analysis:  Pure heulandite.

Chemistry:   XRF analysis of the non-volatiles by J. Taggart, A. Bartel, 
and D. Diems, and volatile analysis by C. Papp, USGS Branch of 
Analytical Chemistry, Denver, showed good heulandite composition:

SiO2	58.30
Al2O3	16.10
FeTO3	<0.04
MgO	<0.01
CaO	7.36
K2O	0.25
Na2O 	1.36
TiO2	<0.02
MnO	<0.02
P2O5	<0.05
H2O	15.30
Other LOI	0.90
	_____
Total	99.71
