Natural Minerals Group

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

# AS1320-AB



ElementWt % OxideWt %
O 37.81
Mg 1.64MgO 2.72
Al 0.03Al2O3 0.05
Si 22.09SiO2 47.27
Ca 3.46CaO 4.84
Mn 31.03MnO 40.06
Fe 3.86FeO 4.96
Zn 0.03ZnO 0.04

Sum100.0 Sum 99.9

Loose grains of rhodonite

Polished rhodonite
Locality unknown
Shown is a reflected light micrograph of a polished, carbon coated rhodonite crystal. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Similar to bustamite, another manganese rich silicate, also in this standard, bustamite has more manganese, thus providing an opportunity for cross checking composition of Ca Mn silicates. The small amount of material used reflects the extreme rarity of high quality rhodonite. The name is from the Greek rhodon - a rose, referring to its color.

Name Description SPI # Each
Rhodonite SPI SuppliesŪ Individual Mounted Microanalysis Standard Item AS1320-AB $
Rhodonite SPI SuppliesŪ Individual Loose Microanalysis Standard Item AS1325-AB $

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