Job vacancy

Hi All, This post announces a job vacancy in my old group for a Diffraction Scientist. Details can be found at: External: https://jobs.csiro.au/job/Melbourne%2C-VIC-Diffraction-Scientist/501287000/?locale=en_GB SEEK:

Re: The passing of Hugo Rietveld

A sad day indeed for powder diffraction. The impact of Hugo Rietveld's work can never be overestimated. Developing and applying the Rietveld method has been central to my work for >30 years. Cheers ooo0ooo Ian Madsen

Re: Parafocussing definition?

Hi Matthew, I've got some nice figures from an old XRD Basics presentation from decades ago - the problem is that all this stuff is in my CSIRO office and I'm at home! However, I will do my best to recall the basic principles of parafocusing In a Bragg-Brentano instrument:- 1. The

RE: Automated XRD Date

When I moved to CSIRO Mineral Chemistry in Melbourne in mid-1977, I inherited a non-working Philips PW1050 based lab-system which had been retrofitted with a home-made stepping motor and controller. It must have been installed during 1975 or 1976 but it was either late 1977 or in 1978 that I

RE: structure solution terminology

Hhmmm. A method which uses a model to calculate a diffraction pattern which is compared with observed data and the difference minimised by refining some parameters. Then restarting the process by randomly shuffling some parameters. I propose RRWAS - Rietveld Refinement With Atom Shuffling. Or

RE: Powder Diffraction Discussion Group on Facebook

Hi All, I don't mind which forum the Rietveld list is conducted on - I can use most of them. However, the critically important issue (mentioned a little earlier in the thread) is that we do not dilute where the requests/information is posted - we are not a very large community and cannot

RE: conversion of rigaku data file

Try using the PowDLL converter http://powdll-converter.software.informer.com/2.2/ Cheers ooo0ooo Ian Madsen Principal Research Scientist CSIRO Mineral Resources Flagship Private Bag 10, Clayton South 3169

RE: PO in parallel beam flat-plat geometry -reg

Dear SM or MS With this geometry the incident beam to sample angle (alpha) is usually fixed at a small value (say, 2 - 10degrees). If you have the ability to scan the sample axis (omega - i.e. changing alpha), then (i) conduct an omega scan (this could be done manually if necessary), (ii)

RE: Instrumental resolution function

Hi All, A most interesting discussion. However, I think that the comments on tube tails have got away from the original question. I interpret the comment “…. some shoulders in the left part of the peaks ..” and the appearance of the supplied plot to be due to the effect of absorption of the

Job vacancy - XRD laboratory manager

Hi All, Just a short note to let you know about a vacancy in my group for an XRD laboratory manager. Details of the position and how to apply can be found at https://recruitment.csiro.au/asp/Job_Details.asp?RefNo=2009%2F969 Cheers

RE: RES: ADS

Hi All, I have been following this discussion with much interest. For what it's worth, I think that you also need to consider issues to do with the data collection strategies used. Periclase has a small cubic unit cell and hence has very few reflections in a typical scan rang used for QPA in

RE: Density calculations for amorphous products

Dear Maria, We are also working on methods for determination of amorphous material. Can you please send me the full reference to the paper you quoted in your message. I urge great caution in the application of the Brindley model for correction of your QPA. Since the microabsorption correction

Convert anisotropic to isotropic thermal displacement

Hi All, I am looking for a small program to allow me to convert anisotropic thermal parameters to an equivalent isotropic value. Can anyone send me such a program (or at least point me to the location of one). Cheers o--oo0oo---o Ian

RE: fixed slits or fixed radiated length Bragg-Brentano XRPD

Hi All, Data collected using conventional, fixed divergence slits (FDS) result in diffraction occurring from a fixed volume of sample (albeit varying in shape). The use of a variable divergence slit (VDS) results in diffraction from a fixed sample area but varying volume and hence a variation in

AXAA2008 Conference and Schools

Hi All, Below is a preliminary announcement of the 2008 Australian X-ray Analytical Association (AXAA) national conference. Please feel free to circulate the announcement to anyone who you feel may be interested. The 2008 Australian X-ray Analytical Association National Conference Location:

RE: Rietveld Round Robin Test

Title: Message There were two papers resulting from a round robin on quantitative phase analysis sponsored by the IUCr Commission on Powder Diffraction. They are:- (1) I.C. Madsen, N.V.Y. Scarlet, L.M.D. Cranswick, T. Lwin, J. Appl Cryst. (2001) 34, 409-426 (2) N.V.Y. Scarlet, I.C.

Synchrotron related Post Doc positions in CSIRO

Dear All, The advent of the Australian Synchrotron in Melbourne (first light ~March 2007) has prompted CSIRO to engage more strongly with this important analytical tool. We are developing a range of science areas which will rely on the use of synchrotron radiation (SR). Recently we have posted

Re: ED-XRD

Thanks for the quick response Lachlan I don't that that simple interpolation of the ED-XRD data to make it look like angle dispersive data will be effective. Each peak in the ED pattern will have generated by a different wavelength, so I guess the scattering factors will have to be varied on a

CSIRO PostDoc positions

Dear All, CSIRO has recently announced a new round of PostDoc positions in a range of research areas in the organisation - see:- http://www.csiro.au/index.asp?type=faqid=PostDocResearchAreas - take the link to Minerals. In this round, 20 positions have been allocated across the whole

Re: Quantitive analysis

Doug, We used commercially available alpha-Al2O3 (corundum) for the recent IUCr-CPD round robin on quantitative phase analysis. The source details are :- Bailalox alumina polishing powder Baikowski International Corporation Standard C 1.0 micron (scratch size - actual

Reference Materials for temperature Calibration.

Namsoo, Robert Dinnebier has an extensive list of materials and their transition points (some solid-solid phase transitions, some melting) on his web-site at:- http://www.mpi-stuttgart.mpg.de/xray/html/temperature_calibration.html Alternatively, the book "X-ray Diffraction at Elevated