DYOS Tool

Natural Minerals Group

From the standards library of SPI Supplies and the C. M. Taylor Company

# AS5050-AB

Benitoite

BaTiSi3O9
ElementWt % OxideWt %
O 34.83
Si 20.38SiO2 43.60
Ti 11.58TiO2 19.32
Ba 33.21BaO 37.09
Sum100.0 Sum100.0
1.5 - 2mm pieces
Polished benitoite in T100-52 mount
Name Description SPI # Each
Benitoite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS5050-AB $
Benitoite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS5055-AB $

# AS1060-AB

Benitoite

Alternate - either version of this item may be used in our Off-The-Shelf Standards

BaTiSi3O9
ElementWt % OxideWt %
O 34.83
Si 20.38SiO2 43.60
Ti 11.58TiO2 19.32
Ba 33.21BaO 37.08
Sum100.0 Sum100.0
Crushed separated crystals
Locality: San Benito County, CA, USA
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 Lα and Ti Kα (4.47 and 4.51 keV respectively). Its name comes from the type locality for this mineral in San Benito County, California.
Name Description SPI # Each
Benitoite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS1060-AB $
Benitoite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS1065-AB $
   
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