SPI Supplies

Almandine Garnet Fe3Al2Si3O12

Locality: New York State, USA

Element%Oxide%
Mg6.45 MgO10.70
Al11.67 Al2O322.05
Si18.32 SiO239.19
Ca3.00 CaO4.20
Mn0.46 MnO0.59
Fe18.09 FeO23.27
Sum100.0 Sum100.0
200 µ m
This is an optical micrograph of a polished, carbon coated almandine crystal taken in reflected light. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Almandine (or almandite) is the iron aluminum end member of the garnets and is a rugged mineral as can be seen from its good polish and prominent relief. Homogeneous garnets are rare so this is a prized material.
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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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