SPI Supplies
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Bustamite (Mn,Ca)SiO3

Locality: Broken Hill, N.S.W., Australia

Element%Oxide%
O38.39
Na0.04Na2O 0.05
Mg0.13MgO 0.22
Al0.02Al2O3 0.04
Si22.46SiO248.05
K0.05K2O 0.06
Ca13.56CaO18.97
Mn18.83MnO24.31
Fe6.32FeO 8.13
Zn0.20ZnO 0.25
Sum100.0Sum100.0
200 µ m
This is a reflected light micrograph of a polished, carbon coated bustamite crystal. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Similar to rhodonite, another manganese rich silicate, also in this standard, bustamite has more calcium, thus providing an opportunity for cross checking the composition of Ca Mn silicates.
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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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Sunday October 12, 2008
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