SPI Supplies

Crocoite PbCrO4

Locality: Dundas, Tasmania, Australia

Element%Oxide%
O19.80
Cr16.09 CrO330.94
Pb64.11 PbO69.06
Sum100.0Sum100.0
200 µ m
This is a reflected light micrograph of polished, carbon coated crocoite crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. This is a useful standard for both lead and chromium. Metallic lead is very soft and therefore difficult to polish, and galena (PbS), has the problem that the X- ray lines for Pb Ma and S Ka overlap in an EDS system. It is in short supply, hence the small (but adequate) number of crystals in the mount. It is a brilliant orange color as can be seen in the NE of the mount.
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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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Thursday February 09, 2012
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