SPI Supplies Individual Loose Microanalysis Standard Item, Minerals Group, Crocoite (alternate to

SPI Supplies Individual Loose Microanalysis Standard Item, Minerals Group, Crocoite (alternate to
SPI Supplies Individual Loose Microanalysis Standard Item, Minerals Group, Crocoite (alternate to
$207.48
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ItemAS1145-AB

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.

Click here for a mineralogical account of everything you might want to know about Crocoite.

Element Wt % Oxide Wt %
O 19.80
Cr 16.09 CrO3 30.94
Pb 64.11 PbO 69.06


Sum 100.0 Sum 100.0