Subject: Re: Sulfate Raman
Date: Thu, 22 Jul 2004 15:39:26 -0500
From: Karla Kuebler <kuebler@levee.wustl.edu>
To: wf11 <wf11@mbari.org>
CC: alianw@levee.wustl.edu

Anhydrite (CaSO4): sulJA008.spc
Bassanite/Plaster of Paris (CaSO4*1/2H2O): 11082009.spc
Gypsum (CaSO4*2H2O): nov0254.spc

At 12:08 PM 7/22/04 -0700, you wrote:
>Hi Folks;
>     Work is going quite well on the cruise.  We have been getting
>spectra of the mineral walls of hot water vents, bacterial mats and
>methane clathrates.  We have a puzzle in one of our spectra.  The marine
>chemists claim that it is anhydrite.  The only reference anhydrite Raman
>spectrum I have with me is from the Cal Tech data base.  The peaks don't
>match.  Could you send me some Raman spectra of  :
>anydrous CaSO4
>CaSO4.1/2H2O, and
>CaSO4.2H2O
>If you could send that as SPC files, I can easily look at them here.
>SPC files are pretty small, and should be will within my limit of 2 Mb
>email.IThese spectra would  help solve a running debate that we have
>going on data interpretation. Your assistance would be appreciated.
>     Hope that all is going well with the lab move and that the
>instruments made it over to the new building in good shape.  I hear that
>the weather in St. Louis is, as usual, hot and humid.  We are sitting
>off the Oregon coast out of sight of land.  Water is beautiful blue,
>skies sunny and temp. around 70F - but the waves are up today.  We are
>reallly bobbing around in high seas with near gale winds.  If the wind
>gets any higher, they will pull the ROV up and wait for things to settle
>down.
>     Yesterday porpoises played around the ship all day, and then
>followed the ROV up from the ocean floor at the end of the day.  I think
>that is a good omen.
>     See you soon.
>John F.

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