SPI Supplies

Marcasite FeS2

Locality: Joplin, Tri-state District, USA

Element%
S53.46
Fe46.54
Sum100.0
200 µ m
This is a reflected light micrograph of polished, carbon coated marcasite crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Identical in composition to the more familiar mineral pyrite, marcasite is formed at low temperatures and is therefore more pure. Pyrite is to sulfides as quartz is to silicates - the most common - and therefore its composition is an essential part of any mineral standard set.
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Cautionary Note
The compositional and other data shown here are intended to convey typical values for this item and do not neccessarily correspond in detail to standard mounts supplied in the past or to be supplied in the future. Items are changed from time to time as stock is exhausted or alternate choices are preferred. These data should, however, give someone contemplating the purchase of an SPI standard a fair indication of what they may expect to receive. Records are kept of all mounts sold so that, should you lose your documentation at some time in the future, we will be happy to replace it at no charge.


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Sunday July 06, 2008
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