A freak phenomenon in the realm of impact factor
The impact factor of Acta Crystallographica Section A jumped from 2.051 in 2008 to 49.926 in 2009. It may be noted that in 2009 this journal had the highest impact factor among all the journals indexed in Journal Citation Reports. Even in 2010, the journal ranked second with impact factor 54.3331,2. The rise in the impact factor of the journal was attributed to a single article entitled ‘A short history of SHELX’ by George Sheldrick3.