SPI Minerals Group

	Element	%		Oxide	%		crocoite
	O	19.80							This is a reflected light micrograph of polished, carbon coated crocoite crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. This is a useful standard for both lead and chromium. Metallic lead is very soft and therefore difficult to polish, and galena (PbS), has the problem that the X- ray lines for Pb Mα and S Kα overlap in an EDS system. It is in short supply, hence the small (but adequate) number of crystals in the mount. It is a brilliant orange color. Locality: Dundas, Tasmania, Australia
	Cr	16.09		CrO3	30.94
	Pb	64.11		PbO	69.06
	Sum	100.0		Sum	100.0

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Name	Description	SPI #	Each
Crocoite	SPI SuppliesŪ Individual Mounted Microanalysis Standard Item	AS1140-AB	$199.56