EN 13925-3:2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Description of equipment
   4.1 General
   4.2 X-ray sources
        4.2.1 General
        4.2.2 Conventional X-ray sources (sealed tubes and
               rotating anode sources)
        4.2.3 Synchrotron radiation sources
   4.3 Incident and diffracted X-ray beam optics
        4.3.1 General
        4.3.2 Monochromators
        4.3.3 Beam dimensions and geometry
   4.4 Detectors
        4.4.1 Types of detector
        4.4.2 Spatial resolution of detectors
        4.4.3 Energy resolution of detectors
   4.5 Goniometers
        4.5.1 General
        4.5.2 Specimen positioning
   4.6 Specimen stage
   4.7 Data collection system
5 Characterisation of equipment components
6 Equipment alignment and calibration
   6.1 General
   6.2 Alignment
   6.3 Calibration
7 Performance testing and monitoring
Annex A (informative) Relationship between the XRPD standards
Annex B (informative) Alignment of Bragg-Brentano diffractometers
Annex C (informative) Procedures for instrument performance
        characterisation
 C.1 General
 C.2 Position, intensity and breadth of a limited number of
      diffraction lines
 C.3 Angular Deviation Curve
 C.4 Line breadth
 C.5 Intensity diagrams
 C.6 Shape Analysis Curve
 C.7 Lattice parameters
 C.8 The use of the Fundamental Parameter Approach
 C.9 Whole pattern fitting
Annex D (informative) Sample report forms for characterisation of
        instruments
Bibliography

This document sets out the characteristics of instruments used for X-ray powder diffraction ("powder" as defined in EN 13925-1:2003, Clause 5) as a basis for their control and hence quality assurance of the measurements made by this technique. Performance testing indicators are given for diffractometer performance testing. Different types and makes of X-ray powder diffractometer vary considerably in their design and intended fields of application. This document attempts to cover as much of this range as possible by keeping to common principles. To make the standard more readily applicable, the Bragg-Brentano configuration is addressed in most detail because of its wide use. Additional considerations and adaptations may be necessary to cover some types of instruments or configuration and some fields of application. Some of these types of instrument are described in Annex B.