[meteorite-list] uRaman data on submitted NWA achondrite

[Greg Stanley]

Gary:

That is really interesting.  It has always amazed me how different some minerals appear (luster and crystal form) in space rocks.  Not to mention minerals not even found in terrestrial rocks.  That is one reason I enjoy this hobby so much.

Congratulations on your specimen.

Greg S.

----------------------------------------
> From: fujmon at mac.com
> To: meteorite-list at meteoritecentral.com
> Date: Fri, 14 Aug 2009 04:59:40 -1000
> Subject: [meteorite-list] uRaman data on submitted NWA achondrite
>
> Aloha,
>
> I received preliminary analysis results from Drs Jeff Taylor and Gary
> Huss of the University of Hawaii HIGP, of a submitted NWA achondrite
> that I suspected could be a lodranite. Dr Taylor used the institute's
> uRaman spectrometer to obtain spectra of the iridescent mineral, and
> much to everyone's surprise, it turns out to be Augite, not
> orthopyroxene, and certainly not plagioclase. Taylor states the main
> phase appears to be olivine, which would make the specimen more likely
> to be a brachinite. The next step is analysis in a low-pressure SEM
> next week, to check phase compositions, verification of high Ca
> content in the augite, and Fe/Mg in the phases.
>
> Sample spectral data can be seen here: http://astroday.net/meteorites.html
>
> Gary Fujihara
> AstroDay Institute
> 105 Puhili Place, Hilo, HI 96720
> (808) 640-9161, fujmon at mac.com
> http://astroday.net
>
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