impact factors for IUCr journals

Thomson Reuters have released their 2013 Journal Citation Reports and these are summarised below. Acta Crystallographica Section D leads the crystallography rankings with an impact factor of 7.232.

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  2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997
Acta Crystallographica Section A 2.069 2.244 2.076 54.33 49.93 2.051 2.385 1.676 1.791 1.829 1.558 1.417 1.749 1.491 1.601 2.146 1.806
Acta Crystallographica Section B 2.095 2.175 2.286 1.829 1.801 2.341 2.163 2.172 1.910 5.418 3.643 2.026 1.955 1.734 1.700 1.612 1.463
Acta Crystallographica Section C 0.535 0.492 0.518 0.745 0.782 0.561 0.719 0.896 0.777 0.728 0.828 0.659 0.570 0.543 0.581 0.577 0.459
Acta Crystallographica Section D 7.232 14.103 12.619 6.326 2.257 2.943 2.620 1.687 1.401 1.693 2.208 1.760 2.124 3.067 2.935 2.244 2.118
Acta Crystallographica Section E     0.347 0.413 0.411 0.367 0.508 0.567 0.581 0.491 0.453            
Acta Crystallographica Section F 0.568 0.552 0.506 0.563 0.551 0.606 0.645                    
Journal of Applied Crystallography 3.950 3.343 5.152 3.794 3.018 3.212 3.629 2.495 5.248 3.534 2.324 1.871 2.583 1.752 1.901 1.569 1.988
Journal of Synchrotron Radiation 3.022 2.186 2.726 2.335 1.994 2.333 2.978 2.38 2.392 1.919 1.144 0.885 1.519 0.924 1.114 1.874 1.688

Impact factors are generally calculated based on a three-year period. For example, the 2013 impact factor for a journal would be calculated as follows:

2013 Impact Factor = A/B

where A = number of times articles published in 2011-2012 were cited in tracked journals during 2013 and B = number of articles published in 2011-2012.