SPI Supplies

Olivine Fo92 - (Mg,Fe)2SiO4

Locality: unknown

Element%Oxide%
O43.89
Mg30.42 MgO50.43
Si19.44 SiO241.58
Mn0.08 MnO 0.10
Fe5.87 FeO 7.51
Ni0.30 NiO 0.38
Sum100.0 Sum100.0
200 µ m
This is a reflected light micrograph of polished, carbon coated olivine crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. Olivine is a silicate which is formed early in the crystallization of a magma, containing major amounts of magnesium and relatively large amounts of nickel, which is not normally found in silicates. The olivine series of minerals ranges from the magnesian end member, forsterite, to the iron end member, fayalite. This is an example contains about 92% of the forsterite end member. It is highly stable, with good surface properties.
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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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Friday July 04, 2008
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