James,
In the construction materials area I can suggest a number of studies on hydraulic cements characterization. First, ASTM has a number of guides, starting with E 1488, Statistical Procedures to Use in Developing and Applying Test Methods which references, among others practices like E 1601, Standard Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method, E691, Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method, and ASTM E2489, Standard Practice for Statistical Analysis of One-Sample and Two-Sample Interlaboratory Proficiency Test Programs. There also is the Consensus Mean, used to assess results from different methods and laboratories. An explanation of those approaches may be found by searching on Dataplot Consensus Mean to get details. I used E691 to assess inter laboratory data on four materials for the hydraulic cement QXRD procedure (ASTM C1365), as reported in P. Stutzman and S. Leigh, "Phase Analysis of Hydraulic Cements by X-Ray Powder Diffraction: Precision, Bias, and Qualification," J. ASTM Int. Vol. 4, No. 5, 2007, JAI101085. I later conducted a proficiency test program, that used the performance criteria of ASTM C1365 in "Quantitative X-Ray Powder Diffraction Analysis of Portland Cements: Proficiency Testing for Laboratory Assessment, in Advances in Civil Engineering Materials, Vol. 3, No. 1, 2014. A third paper that comes to mind is by L. Leon-Reina et al, "Round robin on Rietveld quantitative phase analysis of Portland cements, Jour. Appl. Cryst., (2009) 42, pp. 906-916. Each of these studies utilized multiple samples and provides the details on the statistical procedures used to make the precision assessments. Paul Paul Stutzman Inorganic Materials Group Materials and Structural Systems Division Engineering Laboratory National Institute of Standards and Technology 100 Bureau Drive, Gaithersburg, MD 20899-8615 301-975-6715, 6645 (lab) ________________________________________ From: James Talbot <ja...@ktgeo.com> Sent: Thursday, November 13, 2014 12:53 PM To: rietveld_l@ill.fr Subject: Statistics on semi-quantitative XRD data Hello All, I had the following request from a client: "I am looking for examples of statistics used on semi-quantitative data, i.e. comparing XRD results of multiple samples. Do you have any recommendations or know of any papers that clearly explain their statistical methods? In so many papers, it is glossed over. I have a pretty good handle on my stats, but would prefer to see what other have done with XRD datasets." Can anyone help with this.? I do not know of any of the top of my head. Thanks in advance, James Talbot K-T GeoServices, Inc. 970-641-1235 (office) 940-597-9076 (mobile) 219 North Iowa Street, Unit J Gunnison CO 81230-2479 www.ktgeo.com
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Please do NOT attach files to the whole list <alan.he...@neutronoptics.com> Send commands to <lists...@ill.fr> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
