SPI Synthetics Group

	Element	%					indium_phosphide
	P	21.25							This is a reflected light micrograph of polished, carbon coated synthetic indium phosphide 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 indium for use as a standard, besides which indium is very soft and difficult to prepare in a polished mount. Phosphorus is an element which oxidizes easily and so is unsuitable for mounting and polishing. But the compound, InP, 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. Purity 99.9999%; Source: Alfa Aesar, MA, USA
	In	78.75
	Sum	100.0

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Name	Description	SPI #	Each
Indium Phosphide	SPI SuppliesŪ Individual Mounted Microanalysis Standard Item	AS2110-AB	$199.56