SPI Minerals Group

	Element	%		Oxide	%		magnetite
	O	27.67							This is a reflected light micrograph of polished, carbon coated crystals of magnetite from the famous Minas Gerais locality. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. This is a another useful standard which contains a high concentration of iron in an oxide matrix. Magnetite is so named because of its strong magnetism. The hardness of magnetite can be judged by the fact that the grains stand up above the polished surface of the mount, and its octahedral parting results in surface pitting. Locality: Serra Minas Gerais
	Cr	0.14		Cr2O3	0.21
	Fe	24.12		FeO	31.03
	Fe	48.09		Fe2O3	68.76
	Sum	100.0		Sum	100.0

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Name	Description	SPI #	Each
Magnetite	SPI SuppliesŪ Individual Mounted Microanalysis Standard Item	AS1210-AB	$199.56