SPI Supplies

Sanidine KAlSi3O8

Locality: Hohenfels, Germany

Element%Oxide%
O46.28
Na2.23 Na2O 3.01
Al9.93 Al2O318.76
Si30.23 SiO264.67
K10.05 K2O12.11
Fe0.14 FeO0.18
Ba0.98 BaO1.09
Sum99.8 Sum99.8
200 µ m
This is a reflected light micrograph of polished, carbon coated sanidine crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Sanidine is the potassium rich member of the felspar series, and this example is from a volcanic occurrence at the famous Hohenfels locality. This is the preferred standard for potassium, though care should be taken to avoid high electron beam loading to prevent alkali element migration.
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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 March 21, 2010
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