A quickish post that Bruker-AXS has released XRDWizard V2.9, which allows for Variable Count Data (VCT) data collection, where the measurement time is systematically increased towards higher 2-theta angles (Re Madsen and Hill, 1992, 1994; and David, 1992 ). This allows users to takes advantage of information present at higher angles, which is often hidden in the noise in conventional fixed count time (FCT) powder X-ray diffraction data collection. Bruker's TOPAS 4 now fully supports Variable Count Data format (Bruker *.RAW binary, Madsen and Hill VCT format, and XYE) http://www.bruker-axs.de/index.php?id=topas;
Extra information is on the web at: http://www.bruker-axs.de/news_article.html?&tx_ttnews[tt_news]=106&cHash=8dc64eed75 Variable Counting Time - The golden standard for data collection http://www.bruker-axs.de/uploads/media/Flyer_Variable_Counting_Time_VCT_H88-EXS_04.pdf References: Madsen, I.C. & Hill R.J. (1992): "Variable step-counting times for Rietveld analysis or getting the most out of your experiment time," Adv. X-ray Anal., 35, 39-47 Madsen, I.C. & Hill R.J. (1994): "Collection and analysis of powder diffraction data with near-constant counting statistics," J. Appl. Cryst., 27, 385-392 David, W.I.F. (1992): "Accuracy in Powder Diffraction: Optimization of data collection strategies," Abstract P2.6, NIST Special Publication No. 846, Page 210 ------------------- If people have any information on VCT data collection ability in other data collection software, feel free to follow-on. ------------------- ----------------------- Lachlan M. D. Cranswick Contact outside working hours / Coordonnees en dehors des heures de travail: NEW E-mail / courriel: lachlanc *at* magma.ca Home Tel: (613) 584-4226 ; Cell/mobile: (613) 401-6254 WWW: http://lachlan.bluehaze.com.au/ P.O. Box 2057, Deep River, Ontario, Canada, K0J 1P0 (please use clear titles in any Email - otherwise messages might accidentally get put in the SPAM list due to large amount of junk Email being received. If you don't get an expected reply to any messages, please try again.) (Essayez d'utiliser des titres explicites - sans quoi vos messages pourraient aboutir dans un dossier de rebuts, du fait de la quantite tres importante de pourriels recue. Si vous n'obtenez pas la reponse attendue, merci de bien vouloir renvoyer un message.)