DYOS Tool

Natural Minerals Group

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

# AS5070-AB

Calcite

CaCO3
ElementWt % OxideWt %
C 12.00CO2 43.97
O 47.95
Ca 40.04CaO 56.03
Sum100.0 Sum100.0
2 x 2 x 4mm prisms
#16
Polished calcite in custom standard mount
Name Description SPI # Each
Calcite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS5070-AB $105.00
Calcite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS5075-AB $203.55

# AS1090-AB

Calcite

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

CaCO3
ElementWt % OxideWt %
C 12.02CO2 44.04
O 47.98
Mg 0.01MgO 0.02
Ca 39.98CaO 55.94
Mn 0.01MnO 0.01
Sum100.0 Sum100.0
Variety: Iceland Spar
Locality unknown
This is a reflected light micrograph of polished, carbon coated calcite crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. The rhombohedral cleavage of calcite is visible in these crystals. Iceland spar is the purest form of calcite and is a excellent standard for calcium in carbonates, providing care is taken to avoid excessive beam loading which might cause thermal damage and loss of CO2.
Name Description SPI # Each
Calcite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS1090-AB $105.00
Calcite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS1095-AB $203.55
   
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Thursday February 09, 2012
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