SPI Supplies

Calcite CaCO3

Variety: Iceland Spar

Element%Oxide%
C12.02CO244.04
O47.98
Mg0.01 MgO 0.02
Ca39.98 CaO55.94
Mn0.01 MnO 0.01
Sum100.0 Sum100.0
200 µ m
This is a reflected light micrograph of polished, carbon coated calcite crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. The rhombohedral cleavage of calcite is visible in these crystals. Iceland spar is the purest form of calcite and is a excellent standard for calcium in carbonates, providing care is taken to avoid excessive beam loading which might cause thermal damage and loss of CO2.
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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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Monday October 06, 2008
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