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      https://www.ias.ac.in/article/fulltext/jcsc/131/12/0122

    • Keywords

       

      Lanthanide; actinide; f-block elements; density functional calculations; periodic table

    • Abstract

       

      The periodic table of elements, organised as blocks of elements that contain similar properties, occupies a central role in chemistry. However, the position of some of the elements in the periodic table is a debate that has been ensuing over the past one and a half long centuries. Particularly, the positions oflanthanum (La), lutetium (Lu), actinium (Ac) and lawrencium (Lr) in the periodic table have been quite controversial. Different kinds of studies carried out by various research groups have yet left the fate of these elements undecided as the results of these investigations suggested that these elements could potentially be placed in the d-block, p-block or all four in the f-block. Our recent work looked into this question from a new perspective, involving encapsulation of La, Lu, Ac and Lr into Zintl ion clusters, Pb122- and Sn122-. These clusters were chosen as they provide a fitting environment for the determination of structural, thermodynamic and electronic properties of the encapsulated species. Various results that have been evaluated and subsequently analysed (Joshi et al. in Phys. Chem. Chem. Phys. 20:15253–15272, 2018) in order to seek outsimilarities and differences for making justified conclusions about the placement of all these four elements in the periodic table are the subject matter of this review article

    • Author Affiliations

       

      ADITI CHANDRASEKAR1 MEENAKSHI JOSHI2 3 TAPAN K GHANTY2 3

      1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, Karnataka, India
      2. Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, Maharashtra, India
      3. Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400 094, Maharashtra, India
    • Dates

       
  • Journal of Chemical Sciences | News

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