To make it less thrilling, I suggest that this word97 document should be
offered to all of us by download option. Is this a logistic possibility?
L. Keller
CAMET Research, Inc.
Goleta, CA
Dear Lachlan:
Any (official) opinion by ccp14 on 'PowderX-Software' by Chong Deng which pops
up quite a bit lately in the newsgroup.
Happy New Year
Ludwig Keller
CAMET Research, Inc.
Goleta, CA
As a (commercial) subscriber I do object to any advertisements made on
'[EMAIL PROTECTED]'. I always assumed that this platform is for scientific
exchange only. Maybe I am wrong but could the administrators of
'[EMAIL PROTECTED]' make a clarifying statement concerning the commercial use
of this
Extensive review of SiC polytypes (incl. atomic positions) by P.T.B. Shaffer
in Acta Cryst. B25, 477-488, 1969
l. Keller
Looking for a reliable structure reference of calcium aluminum oxide sulfate,
4CaO-3Al2O3-S03 or C4A3S (PDF #33-256). C4A3S is the 'precursor' for
ettringite formation and is added to Portland cement to produce shrink-
compensated, fast-setting concrete.
Thanks
L. Keller
CAMET Research, Inc.
G
In a message dated 2/23/99 11:13:53 AM EST, [EMAIL PROTECTED] writes:
> The ICSD is available for as little as
> 600 DM ($US 400) per year for individual academic users
So what is the subscription for industrial users; you forgot to mention that.
L. Keller
CAMET Research, Inc.
Goleta, CA
Can anybody explain to me the factor of 10 difference in price for ICSD data
between academic and industrial users. Is there a rational explanation or a
formula which makes an industrial dollar buy only 10cents when shopping at
ICSD? I know of discounts given to academic users for commercial soft
The underlying issue here is the marketing and selling of intellectual
property paid for by the taxpayer. Everbody knows this but certain people
still want to make a dance around it. ICSD as well as ICDD are no charities
but package data of the public domain and sell the package with the data at
You cannot measure stress from a diffraction experiment but (try to)
calculate it from the strain which you can measure. Please specify: is it
macro-st.rain (=residual strain --> line shift) on polycrystalline solids or
micro-strain on polycrystalline powders or - solids (--> line broadening
In a message dated 5/18/99 2:14:54 AM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< I start to be a little bit concerned about all those people claiming and
pointing out that diffraction don't measure a residual stress but a
residual strain.
..
So, my own idea is that p
Just revived a RU-200 rotating anode generator. Can anybody direct me to a
site where facts like anode cleaning procedures, general trouble shooting for
common breakdowns and US-sources for replacement parts other than Rigaku
(filaments, seals etc.) are discussed.
Thanks
Ludwig Keller
CAMET
In a message dated 9/26/99 7:34:05 PM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< Also, I don't know where Armel got that 5000 XRD instruments, in my
impression (au pif, Armel) I would rather say that the XRD lab instruments
in the world is in the 10k to 20k range. >>
Yeah, but he mea
Looking for reliable reference of ettringite structure: Ca6Al2(SO4)3(OH)12 x
26(or 32?)H2O. Is reference cited in PDF #41-1451 of Moore and Taylor, Acta
Cryst. 26B, 386 (1970) still relevant? -- ettringite is believed to be the
culprit in sulfate attack on your conrete foundation when the latte
Is anybody aware of a recent reference on the structure of "Hydrocerussite
Pb3(CO3)2(OH)2"? The latest entry I can locate in the 'Structure Reports' is
from 1966.
Ludwig Keller
I propose the administrator(s) of this group should make a decision if we
subscribers are indeed on a multilingual platform or not and if file
attachment are OK.
L. Keller
In a message dated 12/12/99 10:36:49 AM Pacific Standard Time, [EMAIL PROTECTED]
writes:
<< This group is NOT moderated, which means that any member can
post anything, and I don't see it before you do, nor censor it.
I dont mind an occasional "foreign" language posting (especially in Frenc
In a message dated 12/31/1999 1:24:41 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
<< Seems to me that powder diffractionists in the 1950-70 years, had too
much confidence in powder diffraction.. thus delivering a poor
uncomplete database to real users all those past long y
In a message dated 01/07/2000 1:44:11 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
<< 5. Industrial scientists are usually not interested in structural data,
their
main interests are quality control and qualitative raw materials
characterization. Think of cement industries. >>
Wrong
Looking for a reliable reference on structural data of ferrihydrite
[Fe5O7(OH)x4H2O]
L. Keller
In a message dated 3/29/00 7:22:09 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
<< I would add
that if this phenomenon is indeed responsible for the problems were having
with the profiles, then the tube manufacturers should challenged to address
the matter. It would appear that a
In a message dated 4/1/00 10:33:00 AM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< I have some naive questions :
I would like to hear exactly what is on my powder pattern:
- Kalpha3
- tube tails
or both ?? >>
You probably will not know until you have made sure in wh
In a message dated 04/03/2000 8:08:36 AM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< I would like to see (or do) the single crystal experiment in
order to definitively characterize the "tube tails". >>
If I were concerned and wanted to measure the tails, I would first make sure
that
In a message dated 4/3/00 12:59:08 PM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< The maximum count was 17,500 cps and lobes were observed at about 15 cps >>
This is actually pretty good focussing for powder diffraction application;
the focal to satellite intensity ratio for this tube h
In a message dated 05/19/2000 12:53:29 PM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< Can anyone recommend literature references for
size/strain analysis on "organic" (C, H, O, N)
phases? >>
Do you include polymers which are organic? Then the treatments by Hosemann or
Ruland may b
Is there anybody who could tell me if these parameters for Na2SO4
(thenardite) are the correct ones:
space group Fddd (70) / 8FU/unit cell
Na in 16(f) with y=.4415
S in 8(a)
O in 32(h) with x=-.0206, y=-.0285, z=-.0199
These are the values reported for Na2SO4 by Mehrotra et. al. in Neues Jb.
M
Thanks to all who helped me out so promptly with my thenardite parameters.
Some may wonder why I got two oxygen coordinates wrong when I am able to
quote the original reference. Well, I fell victim again to a misprint in the
"Structure Reports" (i.e. Vol 43A, p.269 in this case) which caused me
In a message dated 8/14/00 6:56:35 AM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< a) what is/are the difference(s) between this 'size' compared to the
size measured by other, mostly optical, methods? (such as laser-
size analyser?) Is the difference orginated from the direction of the
In a message dated 08/15/2000 3:02:58 AM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< The
calculated pattern is constructed by convolution f*g where g comes
from a measurement on a sample unaffected by microstructures, and
f is built from a model of the microstructure (size, microstrai
In a message dated 00-11-09 12:39:08 EST, you write:
<< A company such as USG would not be able to lease the ICSD at the $500
academic price. I no longer remember the for-profit price, but it is
significantly more. However, these prices cover the cost of tabulating
the data -- and would likely
In the study of non-expansive, fast-setting calcium-sulfo-aluminate based
clinker materials, has anybody come across a fluorine bearing phase which is
vaguely described as 'calcium-fluoride-silicate-sulfate'? It supposedly forms
at certain burn conditions in production kilns.
L. Keller
Have a documented c-value of 5.178A for stoichiometric, hexagonal GaN (PDF
card #2-1078); can anybody confirm this value and its uncertainty or are
there updated and/or more precise c-values for GaN (Ga:N=1) available?
L. Keller
<< We have done Rietveld refinement on GaN powder obtained by grinding single
crystals and the results were the following:
a=3.1843(5) c=5.1746(8)
Stan
[EMAIL PROTECTED] >>
I extrapolated a value of 5.1847(5)A on a freestanding (presumably high
purity), [00l] textured GaN film using MoKa1
could somebody direct me to the structure of cubic lithium niobium oxide (Li3NbO4
ao~8.4A); what is it isostructural with?
L. Keller
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