Quantitative Phase Analysis by Rietveld Method

 Theory and hands-on short course (February 22-25, 2005)

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Syllabus

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Qpa Syllabus.doc

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Program Qpa Program.doc Qpa Program.pdf
Application Form Qpa Application.doc Qpa Application.pdf

 

 

XRD.US is running this theory and hands-on short course  from February 22 to 25, 2005 in New York City, USA. The course will be run over 4 consecutive days and is divided into two specific sections: Theory and practice of quantitative phase analysis by Rietveld method.

 

Course objective:

 

The course objective is to give a crystallographic and mathematical background of standardless Rietveld method and hands-on knowledge of modern Rietveld quantification software packages for academia, government and industry professionals. 

 

Course description:

 

The course will consist of two components, the theory of Rietveld analysis and the practical application and use of software packages for Rietveld quantitative analysis. All participants will be supplied with notebook computers with installed necessary software, database, and x-ray diffraction data files of samples of various origins for quantification and tools for learning. The course consists of series of lectures and exercises followed by practical sessions on PCs. Vendors’ representatives will present modern phase quantification software.

 

Theory:

 

             Pre-Rietveld
  • Unit cell, crystal symmetry, space groups, Bravais lattices, atom positions, thermal parameters and cell transformations

  • Powder diffraction, Miller indexes, diffracted intensities, atomic scattering factors, anomalous dispersion

  • Data collection, reduction and formatting, aberrations of Bragg-Brentano data, preferred orientation, absorption contrast, extinction corrections, particles statistics

 

             Rietveld
  • Rietveld intensity equation. Integrated intensities vs. peak shape function. Profile models used for various x-ray laboratory, synchrotron sources, neutron optical configurations

  • Overview of parameters required in the refinement: phase scales, instrumental zero, cell dimensions, half-widths parameters, preferred orientation, line-shape functions, structural parameters, peak asymmetry, split peak shape functions, line broadening and crystal size 

  • Corrections - Lorenz, polarization, absorption, microabsorption, extinction

  • Phase quantification of amorphous materials or in absence of structural data

  • Hints on refinement strategy: what to refine first, early, or later. Diagnostic features of the difference curve

 

Practical:

  • Calculations with hand-held calculator: 1-anomalous dispersion correction, 2-powder pattern of MgO, peak positions, indexing, structure factors, and peak intensities. 3- absorption contrast correction

  • Data file reading, manual and automatic phase identification, Search-Match software, presence of amorphous components

  • Working through a complete quantification of specific problems, such as soil, geological, pharmaceutical, industrial samples

  • Real time demonstration of SIROQUANT™, TOPAS™, RIQAS™ software packages (under guidance of software vendors) 

 

Course fee:

 

Academic and Government: $2000, Industry: $3000, which includes all course notes and CD and use of computers; breakfast and lunch on days 1-4 and course dinner on day 3. Travel and accommodation are responsibility of the participants.

 

Deadline:

 

Places may be reserved by submission of the application form and payment of the course fee by February 3, 2005.

 

 

 

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