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Electron Microprobe Lab, University of Minnesota
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Dear Eric,
Thanks. I had not noticed significant beam damage in my apatites, but then
I'm a (very) modest user of the probe. I do usually try and use as large a
spot size as possible. Some phosphates are significantly degraded under the
beam no matter how careful you are.
Henry
Henry Barwood
Associate Professor of Science, Earth Sciences
Department of Math and Physics
MSCX 312G
Troy University
Troy, Alabama
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From: JEOL-Focused Probe Users List [mailto:[log in to unmask]] On
Behalf Of Eric J Essene 1
Sent: Wednesday, September 06, 2006 12:02 PM
To: [log in to unmask]
Subject: Re: [PROBE-USERS] Help with probe analysis of minerals
Henry,
Microprobe analysis of both the apatite- and bastnaesite-group phases is
quite touchy. Beam damage, degassing and elemental migration (potential F
and Cl increase in apatite with time) are significant problems for these
minerals.
eric
On Sep 6, 2006, at 11:52 AM, Henry Barwood wrote:
JEOL Probe Users Listserver
Moderator: Ellery Frahm, [log in to unmask],
Electron Microprobe Lab, University of Minnesota
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Perhaps someone on the list would be interested in collaborating with me on
the analysis of some mineral specimens for publication. I have been
conducting studies of syenite minerals from the Arkansas alkalic syenites
for over 20 years and would like to work on some of the accumulation of
unknowns that has built up. Unfortunately, here at Troy, my research
capabilities are somewhat limited. If there is anyone who would like to
analyze some of the specimens as a co-author, please let me know. Some of
the partially completed studies that I have waiting include:
Analysis of brithiolite and silician fluorapatites
Mosandrite analysis
Examination of the eudialites from Magnet Cove and Jones Mills
Reexamination of the rare-earth fluorocarbonates from several locations
Thanks.
Henry Barwood
Associate Professor of Science, Earth Sciences
Department of Math and Physics
MSCX 312G
Troy University
Troy, Alabama
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