Project Details:

Priority claims for the discovery of elements with atomic number greater than 111

Remark: Joint IUPAP/IUPAC Working Party

The IUPAC/IUPAP Joint Working Party is charged with examining the priority claims for the discovery of elements with atomic number greater than 111.

The procedures to be followed in assigning priorities and the subsequent naming process will be the same as those used for the recently named elements darmstadtium and roentgenium with atomic numbers 110 and 111, respectively.

In brief, the submissions received will be examined by a IUPAC/IUPAP Joint Working Party of experts the membership of which is approved by the Presidents of IUPAC and of the International Union of Pure and Applied Physics (IUPAP). The JWP will issue its findings in the form of a report and the successful claimants will then be invited to propose a name for any element for the discovery of which they have been given priority.

'Naming of new elements' is the subject of IUPAC recommendations published in Pure Appl. Chem. 74(5), pp. 787-791, 2002; http://dx.doi.org/10.1351/pac200274050787
For a brief review on the synthesis and naming of elements 110 and beyond, by H. Kaesz ; see Chem. Int.2002, 24(2), p. 7.

Claims for the discovery of elements of atomic number greater than 111 have been invited and the scientists name below have submitted the following claims:

• Dr. Amnon Marinov, The Hewbrew University, Jerusalem, Israel; for element 112
• Dr. Kosuke Morita, The Institute of Physical and Chemical Research, Riken, Japan; for element 112 (in part) and element 113
• Dr. Sergey Dimitriev, Joint Institute for Nuclear Research, Dubna, Russia; for elements 112, 113, 114, 115, 116, and 118
• Dr. Sigurd Hofmann, Gesellschaft fur Schwerionenforschung mbH, Darmstadt, Germany; for element 112

> project announcement first published in Chem. Int. Jan-Feb 2007

Z greater than 111 - submission invited to establish priorities for the discovery (posted 25 Jan 06)

 

May 2009 update - The IUPAC/IUPAP Joint Working Party (JWP) on the priority of claims to the discovery of new elements has reviewed the relevant literature pertaining to several claims. In accordance with the criteria for the discovery of elements previously established by the 1992 IUPAC/IUPAP Transfermium Working Group, and reiterated by the 1999 and 2003 IUPAC/IUPAP JWPs, it was determined that the 1996 and 2002 claims by Hofmann et al. research collaborations for the discovery of the element with atomic number 112 at GSI share in the fulfillment of those criteria.

A synopsis of the relevant experiments and related efforts is presented in a technical report published online in Pure and Applied Chemistry on 25 May 2009. See Pure Appl. Chem.  2009, Vol. 81, No. 7, pp. 1331-1343; doi:10.1351/PAC-REP-08-03-05

This report was shortly after followed by the recommendations titled 'Name and symbol of the element with atomic number 112' (IUPAC Recommendations 2010), Pure Appl. Chem. 82(3), 753-755, 2010 [doi:10.1351/PAC-REC-09-08-20]

 

June 2011 update - Priority for the discovery of the elements with atomic number 114 and 116 has been assigned, in accordance with the agreed criteria, to collaborative work between scientists from the Joint Institute for Nuclear Research in Dubna, Russia and from Lawrence Livermore, California, USA (the Dubna-Livermore collaborations).The discovery evidences were recently reviewed and recognized by a IUPAC/IUPAP joint working party.A full synopsis of the relevant experiments and related efforts is presented in a technical report published in Pure and Applied Chemistry 2011, Vol. 83, No. 7, pp. 1485-1498; doi:10.1351/PAC-REP-10-05-01 (online on 1 June 2011)

With the priority for the discovery established, the scientists from the Dubna-Livermore collaborations are invited to propose a name for the two super-heavy elements, elements 114 and 116. The suggested names will then go through a review process before adoption by the IUPAC Council.

June 2012 update - In accordance with IUPAC procedures, the discoverers proposed names as follows: flerovium with the symbol Fl for the element with Z = 114 and livermorium with the symbol Lv for the element with Z = 116. The IUPAC Inorganic Chemistry Division recommended these proposals for acceptance, and they were adopted on 23 May 2012 by the IUPAC Bureau as delegated to act by the IUPAC Council meeting on 3–4 August 2011.  See Pure Appl. Chem., 2012, Vol. 84, No. 7, pp. 1669-1672; http://dx.doi.org/10.1351/PAC-REC-11-12-03 (Published online 2012-06-26)

Project complete - see continuation as project 2012-047-1-200

 

_{Last update: 5 Apr 2013}

• Karol, Paul

• Barber, Robert
• Nakahara, Hiromichi
• Vardaci, Emanuele
• Vogt, Erich