Advanced Certificate in Powder Diffraction on the Web Chapter 18 School of Crystallography, Birkbeck College, University of London

Welcome Page  Course Index  Master Index  Chapter Index 

Aims & Objectives

This release looks at the complex subject of Quantitative Analysis: methods for determining, from powder diffraction data, the weight percentages of micro-crystalline components within a given mixture. Given the changing methodologies involved, the release covers the main principles of both the original and current approaches, discussing en route the particular problem of X-ray absorption by a sample of mixed composition.

The more specific objectives are:

• To start with methods involving just one (or a few) individual diagnostic diffraction peak per component phase.
• To consider the complications that can arise from X-ray absorption by the (unknown) mixture-sample, and how to overcome this problem.
• To move onto the more recent whole pattern fitting methods, with a working example.
• As with most releases, it is recommended that you work your way sequentially through the pages starting at the beginning: Introduction.

Welcome Page  Course Index  Master Index  Chapter Index