DYOS Tool

Natural Minerals Group

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

# AS5040-AB

Barite*

BaSO4
ElementWt % OxideWt %
O 27.42
S 13.74SO3 34.30
Ba 58.84BaO 65.70
Sum100.0 Sum100.0
Assorted prisms - 2-3mm x 6-10mm
Brook Cliffs, Mesa Co., Colorado
Polished Barite in T100-52 mount

* for a mineralogist's account of barite click here
Name Description SPI # Each
Barite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS5040-AB $199.56
Barite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS5045-AB $199.56

# AS1050-AB

Barite

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

BaSO4
ElementWt % OxideWt %
O 27.33
S 13.80SO3 34.46
Sr 0.26SrO 0.31
Ba 58.62BaO 65.45
Sum100.0 Sum100.2
Locality: Sardinia, Italy
This is a reflected light micrograph of polished, carbon coated barite crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Barite also has 3 perpendicular cleavages, accounting for the rectangular crystals and the cavities in the polished surface. This is the standard for the relatively rare element barium. The name refers to its heavy character.
Name Description SPI # Each
Barite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS1050-AB $199.56
Barite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS1055-AB $199.56
   
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Monday March 22, 2010
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