SPI Supplies

Benitoite BaTiSi3O9

Locality: S. Benito Co., California, USA

Element%Oxide%
Si20.38 SiO243.60
Ti11.58 TiO219.32
Ba33.21 BaO37.08
Sum100.0 Sum100.0
200 µ m
This is a reflected light micrograph of a polished, carbon coated benitoite crystal. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Benitoite is a gem mineral which gives a beautiful blue cathodoluminescence in the electron beam, thus making the spot clearly visible in an optical microscope. As a standard for Ba and Ti it is compromised by the proximity of the X-ray lines Ba La and Ti Ka (4.47 and 4.51 keV respectively). Its name comes from the type locality for this mineral in San Benito County, California.
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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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Friday July 04, 2008
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