Skip to main content
Home
Toggle submenu
Who we are
Toggle submenu
Governance
Committees, Statutes and Bylaws
Toggle submenu
Statutes and Bylaws
General Assembly
Executive Committee
Finance Committee
Advisory Committees
Meeting Support Committee
Committee for the Maintenance of the CIF Standard (COMCIFS)
Committee on Data (CommDat)
IUCr and Oxford University Press (OUP) Book Series Selection Committee
Gender Equity and Diversity Committee
Outreach Committee
Committee on Electronic Publishing, Dissemination and Storage of Information
Diffraction Data Deposition Working Group (DDDWG)
Committee on Crystallographic Databases
IUCr Secretariat
Media Enquiries
Principles and Policies
History
Over 75 years of advancing structural science
Toggle submenu
Milestones in IUCr history
The Early History
Aspects of the history of the International Union of Crystallography
60 years of IUCr journals
Previous Executive Committees
Fifty Years of X-Ray Diffraction
Members
Adhering bodies and Associates of the Union
Toggle submenu
Countries
Adhering bodies
Regional Associates
African Crystallographic Association (AfCA)
American Crystallographic Association (ACA)
Asian Crystallographic Association (AsCA)
European Crystallographic Association (ECA)
Latin-American Crystallographic Association (LACA)
Scientific associates
International Centre for Diffraction Data (ICDD)
International Organization for Crystal Growth (IOCG)
Worldwide Protein Data Bank (wwPDB)
Other bodies not belonging to the Union
Committee on Data of the International Council for Science
ISC Committee on Space Research
Interdivisional Committee on Terminology, Nomenclature and Symbols of the International Union of Pure and Applied Chemistry
International Council for Scientific and Technical Information
International Organization for Standards
International Science Council
Commissions
Commissions make up the heart of the Union
Toggle submenu
Commission guidelines
Commission contact table
Commission on Aperiodic Crystals
Commission on Biological Macromolecules
Commission on Crystal Growth and Characterization of Materials
Commission on Crystallographic Computing
Commission on Crystallographic Nomenclature
Commission on Crystallographic Teaching
Commission on Crystallography in Art and Cultural Heritage
Commission on Crystallography of Materials
Commission on Diffraction Microstructure Imaging
Commission on Electron Crystallography
Commission on High Pressure
Commission on Inorganic and Mineral Structures
Commission on International Tables
Commission on Journals
Commission on Magnetic Structures
Commission on Mathematical and Theoretical Crystallography
Commission on XAFS
Commission on NMR Crystallography and Related Methods
Commission on Neutron Scattering
Commission on Powder Diffraction
Commission on Quantum Crystallography
Commission on Small-Angle Scattering
Commission on Structural Chemistry
Commission on Synchrotron and XFEL Radiation
People
Join the World Directory of Crystallographers
Toggle submenu
World Directory
Crystallographers
Login
Associates
What we do
Toggle submenu
Publications
Open-access, peer-reviewed, society-led
Toggle submenu
Journals
International Tables
IUCr Books
Digital Standards
Toggle submenu
CIF
Dictionaries
Specification
Common semantic features
Software
COMCIFS
CheckCIF
Data activities
Databases
GICSI
Open Data
Data sets
Bond valence parameters
Electron crystallography data sets
Standard Powder X-ray Diffraction Data Sets
Organic materials for organic structure solution from powder diffraction data
Meetings
CommDat
Public discussion forum
Crystallographic Information Fiesta
Workshop on Data Science Skills in Publishing: for authors, editors and referees
Workshop report
Workshop on MX raw image data formats, metadata and validation
Workshop report
Workshop on Raw diffraction data reuse: the good, the bad and the challenging
Workshop on When should small molecule crystallographers publish raw diffraction data?
DDDWG
Public discussion forum
Workshop at ECM-27, Bergen: August 6 2012
COMCIFS Symposium at ECM-28, Warwick: August 25 2013
Workshop at ECM-29, Rovinj: August 22-23 2015
Sponsors
Programme
Videos of presentations
Report
Workshop at ACA 2017, New Orleans: May 26 2017
Final report
Online dictionary
Symmetry Font
Awards and Prizes
Honouring our structural scientist community
Toggle submenu
Ewald prize
Struchkov Prize
Bragg Prize
Gjønnes Medal
Nobel prize
Conferences
Toggle submenu
Triennial Congresses
Supported Meetings
Outreach
Toggle submenu
Crystallography in Africa
Crystal Growing Competition
Application form
Logos
IUCr OpenLabs
OpenLab calendar
Success stories
African Crystallographic Association (AfCA)
Building Science Capacity in Africa
International Year of Crystallography 2014
Founding of LAAAMP
Support and Funding
Early Career & Education
Toggle submenu
IUCr Journals Early Career Boards
Teaching pamphlets
Web resources
Teaching resources
A font for crystallographic symmetry elements
Bragg Lecture 2001
Crystal growing
Introduction to the crystal class models
Introductory note
Make some close-packed rhombic dodecahedra
Polyhedral models
Preface
Space filling
The Power of Powder Diffraction
The analytic theory of point systems
The evolution of synchrotron radiation and the growth of its importance in crystallography
Directories
Radiation and diffraction facilities
Software
Software Manuals
Suppliers
Events
Toggle submenu
Events list
Calendar
Photos
IUCr Congress
News
Toggle submenu
Newsletter
Toggle submenu
Latest issue
Archive
Editorial Board
Submit
Notices
Jump to
CIF
International tables
Commissions
Journals
Search
Search
Home
What We Do
Early Career & Education
Directories
Software Directory
KCL
KCL
For KCl structures program to refine parameters in the harmonic approximation. refines individual thermal, scale, extinction parameters in KCl type structures.