impact factors for IUCr journals

All IUCr Journals are tracked by Thomson Scientific (ISI). A summary of the impact factors for IUCr Journals is given below.

  1997 1998 1999 200020012002200320042005
Acta Crystallographica Section A 1.806 2.146 1.601 1.4911.7491.4171.5581.8291.791
Acta Crystallographica Section B 1.463 1.612 1.700 1.7341.9552.0263.6435.4181.910
Acta Crystallographica Section C 0.459 0.577 0.581 0.5430.5700.6590.8280.7280.777
Acta Crystallographica Section D 2.118 2.244 2.935 3.0672.1241.7602.2081.6931.401
Acta Crystallographica Section E          0.4530.4910.581
Acta Crystallographica Section F             
Journal of Applied Crystallography 1.988 1.569 1.901 1.7522.5831.8712.3243.5345.248
Journal of Synchrotron Radiation 1.688 1.874 1.114 0.9241.5190.8851.1441.9192.392

* Acta Crystallographica Section F is covered by ISI, but as a new journal will not receive an impact factor until 2007 impact factors are published.

Impact factors are generally calculated based on a three-year period. For example, the 2005 impact factor for a journal would be calculated as follows:

2005 Impact Factor = A/B

where A = number of times articles published in 2003-2004 were cited in tracked journals during 2005 and B = number of articles published in 2003-2004.