Natale,
>I am looking for papers dealing with the mineralogy and crystallography of
>biogenic (coralline) aragonite and calcite. Any help and suggestion will be
>welcome.
It's a bit old but you might try Reeder, ed, 1983, Carbonates: Mineralogy
and Chemistry, Reviews in Mineralogy, vol 11, esp ch
Armel,
We use a gadget marketed by McCrone that is not a ball mill, but has small,
cylindrical elements. (It's relatively inexpensive, ~2500$US, I think.)
These can be of either agate or alumina. There are 56 elements close packed
in a canister w/ a capacity of ~100 mL. We use these w/ ~2 gm of s
[EMAIL PROTECTED]
Hongwu,
We collect our data on a VAX, change it to ASCI, FTP it to a Mac, parse it
in EXCEL, plot in Kaleidagraph, copy the graph made in Kaleidagraph to
Canvas, and alter it, label it, and whatever to our satisfaction. It can
then be printed directly or embedded in Microsoft W
Hannes,
I suggest that you find copies of:
Hermann, Armin (1979) The New Physics: the Route into the Atomic Age. In
Memory of Albert Einstein, Max von Laue, Otto Hahn, and Lise Meitner: Inter
Nationes Bonn-Bad Godesberg, Munich.
There are photos of the apparatus that Friedrich and Knipping used
Hannes,
I suggest that you find copies of:
Hermann, Armin (1979) The New Physics: the Route into the Atomic Age. In
Memory of Albert Einstein, Max von Laue, Otto Hahn, and Lise Meitner: Inter
Nationes Bonn-Bad Godesberg, Munich.
There are photos of the apparatus that Friedrich and Knipping used
>Does anyone know of a good reference which discusses peak asymmetry in
>low angle X-ray powder diffraction data?
Bruce,
Such peaks characterize many XRD tracings of clay minerals. I suggest
looking first at Reynolds 1989, Diffraction by small and disordered
crystals. In Bish, D.L., and Post, J.E
Natale,
I suggest that you contact Peter Burns in the Dept of Geology at Notre Dame
(ph: 219-631-5380; or try [EMAIL PROTECTED], I'm not sure of the e-mail
address)
Peter works with XRD at very small angles, some for spacings in the 40Å
range. The signal is caught on a charge coupled device and
>Looking for a reliable reference on structural data of ferrihydrite
>[Fe5O7(OH)x4H2O]
>
>L. Keller
see the papers of Udo Schwertmann. I think he knows more about ferrihydrite
than anyone.
Dewey
__
D.M.Moore, Senior Clay Mineralogist
