Steinar,
The most common exsolution in hematite is ilmenite (and
vice-versa). It can be identified on the electron microprobe or SEM
with EDS. There are a lot of publications on this topic, starting with
Buddington & Lindsley (1964). You might check out the following
citations.
eric
Braun, E. & Raith, M. (1985) Fe-Ti-oxides in metamorphic basites from
the Eastern Alps, Austria: a contribution to the formation of solid
solutions of natural Fe-Ti-oxide assemblages. Contr. Mineral. Petrol.
90, 199-213.
Mitra, S Ahmed, S.S. & Moon, H.S. (1992) Mineralogy and chemistry of
the opaques of Cox Bazar (Bangladesh) beach sands and the oxygen
fugacity of their provenance. Sed. Geol. 77, 235-247
On Sep 28, 2004, at 7:20 AM, Steinar Ellefmo wrote:
> Dear list,
>
> I'm working with a metasedimentary magnetite-hematite
> iron ore. In some of the hematite grains I have found
> small exsolutions. The same type exsolutions have been
> reported by Ramdohr (1980, The Ore Minerals and Their
> intergrowths, 2nd ed. Page 972-973).
>
> I haven't been able to come any further than Ramdohr
> when it comes to quantifying the composition or
> conlude on any other property.
>
> My question to the list is whether some of you have
> experience with these kind of exsolution or / and if
> you know of any publications on the subject.
>
> Best regards,
>
> Steinar Ellefmo
>
> =====
>
>
>
>
>
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