SPI Synthetics Group

	Element	%					gallium_arsenide
	Ga	48.20							This is a reflected light micrograph of polished, carbon coated synthetic gallium arsenide crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. There are no minerals containing significant amounts of gallium for use as a standard. Arsenic is an element which oxidizes easily and so is unsuitable for mounting and polishing. But the compound, GaAs, widely used in the semi-conductor business, contains both these elements in major amounts, and is stable and easily polished. hence its presence in this set. Source: Alfa Aesar, MA, USA
	As	51.80
	Sum	100.0

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Name	Description	SPI #	Each
Gallium Arsenide	SPI SuppliesŪ Individual Mounted Microanalysis Standard Item	AS2100-AB	$199.56