SPI Minerals Group

	Element	%		Oxide	%		pollucite
	H	0.20		H2O	1.79				This is a reflected light micrograph of polished, carbon coated pollucite crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Pollucite is the only mineral which contains significant amounts of the rare element cesium. It even has a small amount of rubidium, which is not found as a principal component in any mineral. The Bernic Lake pegmatite is one of the world's major producers of rare elements like cesium (Cs), niobium (Nb) and tantalum (Ta). Locality: Bernic Lake, Canada
	Li	0.20		Li2O	0.43
	O	36.70
	Na	1.30		Na2O	1.75
	Al	8.50		Al2O3	16.06
	Si	22.00		SiO2	47.07
	K	0.10		K2O	0.12
	Rb	0.70		Rb2O	0.77
	Cs	30.00		Cs2O	31.81
	Sum	99.7		Sum	99.8

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Name	Description	SPI #	Each
Pollucite	SPI SuppliesŪ Individual Mounted Microanalysis Standard Item	AS1290-AB	$199.56